A34 A1
www.MDHearingAid.com
Printed in U.S.A.
06.14
User Manual
1
Congratulations!
As the owner of the MDHearingAid®PRO Hearing Aid, you may once
again enjoy the sounds of your environment and conversations with
your family and friends at a price you can afford. In order to get the
most out of your MDHearingAid
®
PRO, please read this User Manual in
its entirety. Your satisfaction with hearing aids depends on the type and
degree of your hearing loss as well as your expectations. No hearing
aid can restore normal hearing, and not everyone will benet equally.
Please read this User Manual in its entirety before using
your MDHearingAid
®
PRO. Thank You!
The MDHearingAid
®
Story ....2
Package Contents ..........4
Hearing Aid Diagram ........6
Quick Start Guide...........7
Fitting & Assembly
1. Insert Battery...........8
2. Attach PRO Thin Tubing ..9
3. Attach Ear Dome.......10
4. Place Behind Ear ...... 11
5. Stabilizer Bar..........12
6. Turn Hearing Aid On ....13
Getting the Most from ......14
Your Hearing Aid
Care & Cleaning...........19
In Case of Malfunction ......20
Optional Accessories .......21
and Replacement Parts
Troubleshooting ...........22
Battery Information.........26
Using the Telephone .......28
Warranty & Repair .........29
Return Policy .............30
Warning to Hearing ........32
Aid Dispensers
Important Notice for ........34
Prospective Users
Notice of Cancellation ......36
Technical Specications.....37
Table of Contents
2 3
Dr. Cherukuri worked with world-class Doctors of Audiology and Audiologists
to create the MDHearingAid®PRO to their exact technical specications, so
that the range of sounds associated with the human voice would be amplied,
without overly amplifying background sounds.
The MDHearingAid®PRO has been rigorously tested by leaders in the
hearing loss eld (ENT Physicians and Audiologists) who have unanimously
agreed that the sound quality and output is incredibly accurate.
The MDHearingAid® Story
The MDHearingAid®PRO was developed by a board-certied Ear,
Nose and Throat physician in Chicago, IL, Dr. Cherukuri. He
encountered patients in his daily practice who would benet from
hearing aids, but many simply couldn’t afford the thousands of
dollars needed to pay for them. As a physician, he knew the
effects of untreated hearing loss: depression, social isolation,
anxiety, and other symptoms consistent with Alzheimer’s disease.
Dr. Cherukuri set out to nd a reasonable solution that could help with
the most common types of hearing loss at a reasonable price. He was
looking for a “one-size-ts-most” hearing aid, similar to reading glasses,
that can easily be purchased at the drug store.
He evaluated numerous hearing aids and sound ampliers, including
those seen on television. He found almost all of these devices only
amplied low frequencies (below 1000 Hz); however, the majority of
hearing loss is in the higher frequencies (1000-4000 Hz), those most
related to the human voice.
54
MDHearingAid
®
PRO
Package Contents
Thin Tubing for Both Ears
For Right ear, use Tubing
labeled in Red.
For Left ear use Tubing
labeled in Blue.
Cleaning Tool
Use Brush for removing wax around
Ear Dome. Use the Magnet for
replacement of battery. Use Wire
to clean Tubing (after removing
from Hearing Aid Body).
Package of Size 13 Batteries
(orange tab)
Left Ear
Please note: the zinc-air battery
must be exposed to air for 1 minute
before it is fully operational.
Traditional Tubing System (Optional)
This is ONLY for people needing
maximum volume or a customized
tubing length. (See separate package
located under tray.)
Traditional Tubing
System
8 mm
9 mm
10 mm
12 mm
14 mm
Closed Ear Domes are best for
individuals who have low to high
frequency loss or require
higher volumes.
9 mm 12 mm 15 mm
Open-Fit Ear Domes (vented) allow
natural sound to enter the ear. Best for
those with high frequency loss and do
not require high volume.
6 mm 9 mm 12 mm
Wire
Magnet
Brush
Tubing
Earhook
Right Ear
6 7
MDHearingAid
®
PRO
Diagram
Steps
Quick Start Guide
PRO Tubing Base
Volume Dial
Power &
Program Switch
Battery
Compartment
Hearing Aid
Body
Ear Dome
Thin Tubing
Six Easy Steps for Fitting and
Assembling Your
MDHearingAid®PRO
Step 1: Insert Battery
Step 2: Attach PRO Thin Tubing to
Hearing Aid Body
Step 3: Attach Ear Dome to Thin Tubing
Step 4: Place Hearing Aid Behind Ear
and Test Ear Dome for Fit
Step 5: Stabilizer Bar Adjustments
Step 6: Turn the MDHearingAid®PRO On
Battery
Stabilizer Bar
8 9
Step 1
Fitting and Assembly
Step 2
Step 2: Attach Thin Tubing
to Hearing Aid Body
Select the Right or Left Tubing
Use Right Tubing (Red label)
for tting Right ear. Use Left Tubing
(Blue label) for tting Left ear.
a) Hold the top of the PRO Tubing Base
(the triangular end), and place it on
the Hearing Aid Body’s threaded end.
b) Twist the Hearing Aid Body clockwise, while
gently pushing Tubing Base onto threaded end,
approximately 3 full revolutions.
c) Make sure Tubing Base is ush with wide sides
of the Hearing Aid Body when you are nished.
Positive
side up
b) b)
a) a)
c) c)
Step 1: Insert Battery
a) Remove the orange adhesive tab to
activate the battery. The zinc-air battery
must be exposed to air for 1 minute
before it is fully operational.
b) Push the Nail Grip downward to
open the Battery Compartment. With
the red “+” side of Battery Compartment
facing up, use the Cleaning Tool Magnet
(or your ngers) to insert the Battery.
c) Close the Battery Compartment.
Please note: If the Battery Compartment
does not close easily, the battery is
inserted upside down.
WARNING: Do not turn ON Hearing Aid until
Ear Dome is positioned securely in your ear
canal. Otherwise whistling will occur.
1110
Step 3 Step 4
Step 4: Place Hearing Aid Behind Ear
b) b)
a) a)
c) c)
Don’t attach Ear Dome upside down.
a) Place Hearing Aid Body behind the ear.
The curve of the Tubing should rest on top of
the ear comfortably (in front of any eye wear).
b) Hold the Tubing at Stabilizer Bar junction.
c) Insert Ear Dome with gentle pressure into
the ear canal. The ‘mushroom’ top of the Ear
Dome should t in the ear canal snug not tight.
Test Ear Dome for t: nod your head up
and down and side to side while simulating
chewing; if the Ear Dome slips out easily,
it is too small.
Repeat with different sized Ear Domes to
nd the best t for you.
Step 3: Attach Ear Dome to Tubing
a) Hold the Thin Tubing at the junction
of the Stabilizer Bar with one hand and
hold the ‘mushroom’ top of the Ear
Dome with the other hand.
b) Push the Ear Dome over the ridges
on the end of the Thin Tubing.
c) Pull in the reverse direction to make
sure the Ear Dome is attached securely.
13
Step 5 Step 6
Step 5: Stabilizer Bar Adjustments
a) The Stabilizer Bar feature helps
keep the Tubing and Ear Dome
properly positioned in the ear.
b) Tuck Stabilizer Bar in the outer
bowl of the ear. It may be trimmed
to suit the size of your ear.
c) When the Ear Dome has been
inserted properly in the ear canal the
Tubing should be ush against the ear.
d) Give a gentle push on the Tubing to
make the Ear Dome snug. (The Tubing is
reinforced in this area for this purpose.)
b)
a)
c)
Stabilizer
Bar
Step 6: Turn the
MDHearingAid®PRO
On
Above the Power & Program Switch
‘O’ indicates OFF. Flip the switch to the
‘N’ or ‘H’ Program to turn Hearing Aid ON.
‘N’ indicates Normal amplication of
high, mid, and low frequencies. Use
this Program if you have a “at” loss
(a hearing loss in all frequencies).
‘H’ indicates High to mid frequency amplication
with less amplication in low frequencies. Use
this Program if you have a “sloping” hearing loss,
or if you desire less background noise.
Try both Programs at various volumes to see
which combination works best for you.
CAUTION! Please raise the volume SLOWLY until you can hear
speech at a normal range and to avoid a sudden blast of sound.
Volume
Dial
Power &
Program Switch
d)
12
1514
Getting the Most from Your Hearing Aid
Your satisfaction with hearing aids depends on the type and degree of your
hearing loss and your expectations. No hearing aid can restore the normal
hearing of youth, including those costing thousands of dollars.
However, you can maximize the return on your investment by understanding
the 3 keys to Hearing Aid Happiness:
Balance
Patience
Fit
Happiness
Patience: Using hearing aids takes practice and patience.
Balance: Both ears
need to hear.
Fit: If the hearing aid
does not t properly,
it will not work.
Key #1 — Fit
Hearing aids, no matter how expensive, will not work unless they
are tted correctly. Without a proper t, it is impossible to reap
the full benet of your investment.
• Your MDHearingAid®PRO comes with six different silicone Ear Domes.
Choose the appropriate size Ear Dome so that the t inside the ear canal is
snug. If the t is loose, feedback will occur, and you may hear a whistling
noise when the Hearing Aids are ON.
• You may nd that you require a different size Ear Dome once your ear has
adjusted to wearing Hearing Aids regularly.
• If you require a higher volume, consider replacing the PRO Thin Tubing with
the Traditional Tubing System. The Traditional Tubing has a larger diameter
for maximum volume potential. (See Package Contents on page 5.)
• If you still are having difculty tting your Hearing Aids please contact
MDHearingAid® Customer Service (customerservice@mdhearingaid.com)
for guidance.
16 17
• In noisy environments, you may nd it easier to understand speech by
facing the speaker. Reading lips and observing facial expressions and
body language reinforce the sound communication.
• It takes time for Hearing Aids to feel comfortable. For the quickest
acclamation we recommend wearing the Hearing Aids all day long.
If this becomes unbearable, try wearing them for 30 to 60 minutes a
day at rst, and gradually extend the time that you wear them.
Using Hearing Aids takes practice and patience. Some
people adjust very quickly and most adapt within a few
weeks. Please do not give up prematurely. A whole new
world of sound awaits you.
Key #2 — Patience
New hearing aids can be a big adjustment. Your brain has to re-learn how to
hear and listen. After many years of not hearing well, it takes time and practice
to redevelop these skills. Medical studies show that your brain requires
approximately 21 days to adjust to your new Hearing Aids. During this time:
• You may initially notice lots of background sounds. These sounds
have always been a part of your environment. In time your brain will
recall how to process these sounds by prioritizing foreground over
background sounds.
• You may nd that a quiet environment is more comfortable in the
beginning of the adjustment period.
• Your voice may sound too loud. This effect is very common for new
hearing aid users, but most people get used to it over time.
• You voice may also sound ‘plugged up’ or like you’re talking in a barrel.
This occlusion effect is normal. The sensation usually goes away in
the rst few weeks.
18 19
Care and Cleaning
Follow these tips to keep the MDHearingAid®PRO performing optimally:
• Wipe your Hearing Aid daily with a tissue or soft cloth. Water, alcohol, or
other liquid agents will damage it.
• Keep your ears clean to maximize the benet of your MDHearingAid®PRO.
Earwax can clog up Tubing. For best results, it may be benecial to clean your
ears with an over-the-counter ear wash kit or visit your physician.
• Use the wire on the Cleaning Tool to keep PRO Thin Tubing free from debris.
• Use the brush on the Cleaning Tool to gently clean away wax and other debris
• Do not let the Hearing Aid get wet. Do not use hair spray or a hair dryer while
wearing the Hearing Aid. Do not expose the Aid to excess moisture or heat.
• Avoid physical shock to the Hearing Aid, such as dropping it on the oor.
• Store your Hearing Aid in a cool dry place when not in use with the Battery
Compartment door open.
• If you are not going to use the Hearing Aid for a prolonged period of time,
remove the battery to prevent corrosion.
Key #3 — Balance
We are born with two ears for balance. It is best to maintain balance while
treating hearing loss. If you have hearing loss in both ears, medical studies have
shown that you will get far greater satisfaction and the BEST results by
wearing two Hearing Aids for the following reasons:
• You will have a signicantly better understanding of speech and conversation,
since the brain is receiving sound from both ears.
• You will nd there will be less overall background noise amplication.
• You will have better hearing and understanding in noisy situations.
• You will have better localization of the direction of sounds.
• Your listening will be more pleasing, effortless, and less frustrating.
If you have hearing loss in both ears and only ordered one Hearing Aid,
we strongly encourage you to use the enclosed Offer Code for a discount on
a second MDHearingAid®PRO. As always, you will receive a 45-Day risk-free
trial with our money-back guarantee.
20 21
In Case of Malfunction
Should your Hearing Aid not function properly, try the following:
1. Make sure the Hearing Aid is switched ON.
2. Change the battery. After removing the orange tab on the new
battery, make sure you wait 1 minute before the battery is inserted.
3. Check that the Ear Dome or Tubing is not blocked by earwax.
Use the included Cleaning Tool.
4. Disconnect the Tubing from the Hearing Aid Body and check for
moisture in the Tubing.
5. Read the Troubleshooting guide on the following pages.
6. Check the website www.mdhearingaid.com/customer-service/
for more Troubleshooting tips.
Traditional Tubing Kit
Optional Accessories
MDHearingAid® Product Protection Plan
• Offers you 100% protection from ALL types of accidental
damage, including damage not covered by our standard 90-Day Warranty
(water damage, pet damage, battery corrosion, stepping on Hearing Aid, etc.)
• Coverage must be purchased within your initial warranty period.
• This service contract lasts for 1 year from the date of purchase.
Tubing and Ear Dome Replacement
For OPTIMAL PERFORMANCE, Tubing
and Ear Domes should be replaced every
3 to 6 months. Over time, Tubing and Ear
Domes may become stiff and discolored.
Regular replacement keeps your Hearing Aids
sounding and feeling like new.
• Visit www.mdhearingaid.com/accessories
to order PRO Thin Tubing, Traditional Tubing
and your Product Protection Plans.
PRO Thin Tubing Kit
22 23
• Check for any cracks in the Tubing
or Base. Cracks may become
another entrance for sound to
enter and cause feedback.
• Lower the volume if it is set too
high, and try using a non-vented
Closed Ear Dome.
• Clean any wax from the Tubing
or Ear Dome that may be
interfering with the Hearing Aid.
(See enclosed Cleaning Tool.)
• Whistling (feedback) occurs when
amplied sound returns to the
microphone and is re-amplied.
Most hearing aids (even ones
costing thousands of dollars) will
whistle when not inserted properly
in the ear canal.
• Conrm that the Hearing Aid is
working properly by removing the
Aid and covering the end of the
Tubing or attached Ear Dome
with your nger. The whistling
should stop.
• Try reinserting the Ear Dome
into ear so it ts better. If that
doesn’t work, try a different
size Ear Dome.
• Occasionally, whistling may
occur when you have a blockage
of wax in the ear canal from a
cold or any condition that causes
sound to be reected from the
ear canal. In these cases, the t
may be ne and the whistling will
disappear when the condition
is corrected.
Troubleshooting
1. Instrument makes a whistling sound
For optimal performance, the Hearing Aid Ear Domes and
Tubing should be replaced every 3-6 months. Replacements
can be ordered at: www.mdhearingaid.com/accessories.
24 25
3. Sound is distorted or intermittent
• Flick the Power & Program Switch
back and forth, in case dust or lint
has collected in the controls.
• Check the battery contacts for
corrosion.
• Replace the battery with a
fresh one.
• Lower the volume.
• If the Hearing Aid were in a
humid environment or subject
to sweat, moisture may clog
the Aid and distort sounds.
Consider using a Hearing Aid
dehumidier overnight.
• Check the Ear Domes and
Tubing for wax that may be
blocking sound, or for any signs
of wear. Replace the Tubing and
Ear Domes if they appear stiff,
bent, cracked,or frayed.
Replacements can be ordered at:
www.mdhearingaid.com/
accessories.
• If you still are having difculty
with your Hearing Aids please
contact MDHearingAid
®
Customer
Service at customerservice@
mdhearingaid.com or call
312-219-8422 for guidance.
The ofce hours are Monday to
Friday, 8:30 am to 4:30 pm (CST).
2. Instrument has a weak or no sound
• Make sure the Hearing Aid is
ON. The volume dial should
be set above the number 1.
• Flick the Power & Program Switch
back and forth, in case dust or lint
has collected in the controls.
• Make sure battery is fresh.
If there is any doubt, try a
new battery.
• Make sure battery is
inserted correctly and
Battery Compartment
is completely closed.
• Check the battery contacts
for corrosion.
• Reposition the Tubing and
readjust the Ear Dome in your
ear canal.
27
Screws on Hearing Aid Body
Positive
side up
Battery Information
Caution! Batteries can be harmful if swallowed. Be sure to keep
batteries out of reach from children and pets. If a battery is accidentally
swallowed, seek medical attention immediately, or call The National
Battery Hotline collect at 202-625-3333.
Battery Type:
The MDHearingAid®PRO uses size 13 zinc-air batteries (orange tab).
Battery Tips:
• Extend battery life by switching the Hearing Aid OFF when not
in use and by leaving the Battery Compartment open every night.
• New zinc-air batteries require “time to breath”. After removing
the orange tab, expose battery to air for 1 minute before inserting it
into the Battery Compartment.
• Use Magnet on Cleaning Tool to assist with the placement
and removal of the battery.
• Do not use batteries that are expired, unsealed, or showing signs of corrosion.
• Do not leave exhausted batteries in the Hearing Aid. They may leak and
damage the Hearing Aid.
Battery Removal:
1. Hold Hearing Aid over a table
(with screws facing up) and open
the Battery Compartment.
2. Turn Hearing Aid over and
the battery will fall out.
26
28 29
Warranty and Repair
The MDHearingAid®PRO is covered against defects in materials and workmanship
for 90 days from the date you receive your order. If our examination determines
that the unit failed to work due to parts, materials or workmanship, we will repair or
replace it for free. This warranty does not cover malfunctions due to unusual wear
and tear or mistreatment of the Hearing Aid, such as physical shock, damage from
moisture or sweat, excessive wax build-up, or tampering with the instrument, all of
which void the warranty.
If you require Warranty or Repair Service, please contact Customer
Service for a Return Merchandise Authorization (RMA) number, repair costs,
and instructions.
For fastest service e-mail:
support@mdhearingaid.com
Or, call Customer Service at:
312-219-8422. Ofce hours:
Monday to Friday,
8:30 am to 4:30 pm (CST).
Repair Facility address:
MDHearingAid, Inc.
Repairs Department
18447 W. 8 Mile Road
Detroit, MI 48219-1520
Please do not mail to this
address without contacting
Customer Service rst.
Using the Telephone
If your Hearing Aid whistles while using the telephone, try various positions
with the telephone receiver, until you discover the arrangement that works
best for you.
1. Use the phone with your Hearing Aids ON your preferred Program ‘N’ or ‘H’.
2. Try holding the phone near the Hearing Aid microphone at the front
and top of the Hearing Aid Body (where the Tubing attaches to the
Hearing Aid Body).
3. Also try holding the phone behind your ear, below your ear, or angled such
that the phone receiver is tilted and open forward.
Please note: The speaker function on your phone also works well with
your MDHearingAid®PRO Hearing Aids.
30 31
At MDHearingAid
®
your satisfaction is guaranteed.
To get the most out of your MDHearingAid®PRO Hearing Aids, please
understand that no hearing aid will restore normal hearing. Your satisfaction
with the MDHearingAid®PRO depends to some degree on your expectations
and commitment to re-training your brain how to hear and listen.
45-Day Trial Period
You have 45 days from the date of purchase to return the Hearing Aids. The
reason for this long trial period is that often it takes several weeks to get
used to the sound of new hearing aids.
21-Day Full Refund Policy
Medical studies show that your brain requires approximately 21 days to adjust
to new hearing aids. If, after 21 days of using the MDHearingAid®PRO
(and before the 45th day from purchase), you are still not satised,
please contact us for a Return Merchandise Authorization (RMA) number.
You will receive a full refund of your purchase price less shipping costs
(or as directed by the site where you made the purchase). Detailed return
instructions will be explained over the phone or can be e-mailed to you along
with your RMA number.
For fastest service, please e-mail support@mdhearingaid.com. Alternatively,
you may call 312-219-8422. Customer Support ofce hours are Monday to
Friday, 8:30 am to 4:30 pm Central Standard Time.
Restocking Fees
Requests for an RMA number prior to trying the hearing aid(s) for 21 days
will be granted but will carry a ten percent (10%) restocking fee. Returns made
without a RMA number will incur a twenty percent (20%) restocking fee.
We are sorry, but we are unable to honor return requests after 45 days from
the date of purchase.
Return Policy
Return Facility address:
MDHearingAid, Inc.
Returns Department
18447 W. 8 Mile Road
Detroit, MI 48219-1520
Please do not mail to this
address without contacting
Customer Service rst.
Number of Days
from Invoice
1-21
21-45
45+
Amount
Refunded
90% (with RMA)
100% (with RMA)
No Refund
32 33
Stop using the MDHearingAid®PRO and consult a physician if:
Warning to Hearing Aid Dispensers
A hearing aid dispenser should advise a prospective hearing aid user to
consult promptly with a licensed physician (preferably an ear specialist) before
dispensing a hearing aid if the hearing aid dispenser determines through
inquiry, actual observation, or review of any other available information
concerning the prospective user, that the prospective user has any of the
following conditions:
• Visible congenital or traumatic
deformity of the ear.
• History of active drainage from the
ear within the previous 90 days.
• History of sudden or rapidly
progressive hearing loss within the
previous 90 days.
• Acute or chronic dizziness.
• Pain or discomfort in the ear.
• Unilateral hearing loss of sudden
or recent onset within the previous
90 days.
• Audiometric air-bone gap equal to
or greater than 15 decibels at 500
hertz (Hz), 1000 Hz, and 2000 Hz.
• Visible evidence of signicant
cerumen accumulation or a
foreign body in the ear canal.
• Hearing in one or both ears
worsens.
• Hearing does not improve while
using the MDHearingAid®PRO.
• Skin irritation develops in or
around your ear canal.
• Your ear becomes occluded with
excessive ear wax.
• You develop an infection of your
ear or ear canal.
Special care should be exercised in selecting and tting a hearing aid whose
maximum sound pressure level exceeds 132 decibels because there may be
risk of impairing the remaining hearing of the hearing aid user.
A hearing aid will not restore normal hearing and will not prevent or improve a
hearing impairment resulting from organic conditions. In most cases infrequent
use of a hearing aid does not permit a user to attain full benet from it. The
use of a hearing aid is only part of hearing rehabilitation and may need to be
supplemented by auditory training and instruction in lip reading.
34 35
Important Notice for Prospective Users
If you have reservations about your ability to adapt to amplication, you should
inquire about the availability of a trial/rental or purchase/option program. Many
hearing aid dispensers now offer programs that permit you to wear a hearing
aid for a period of time for a fee after which you may decide if you want to
purchase the hearing aid.
Federal law restricts the sale of hearing aids to those individuals who have
obtained a medical evaluation from a licensed physician. Federal law permits a
fully informed adult to sign a waiver statement declining the medical evaluation
for religious or personal beliefs that preclude consultation with a physician. The
exercise of such a waiver (without prior consultation by an ear specialist) is not
in your best health interest and its use is strongly discouraged.
Children with hearing loss
This product is not for use by anyone under 18 years of age. In addition
to seeing a physician for a medical evaluation, a child with a hearing loss
should be directed to an audiologist for evaluation and rehabilitation. Hearing
loss may cause problems in language development, educational growth, and
social growth of a child. An audiologist is qualied by training and experience
to assist in the evaluation and rehabilitation of a child with a hearing loss.
Good health practice requires that a person with a hearing loss have a medical
evaluation by a licensed physician (preferably a physician who specializes
in diseases of the ear) before purchasing a hearing aid. Licensed physicians
who specialize in diseases of the ear are often referred to as otolaryngologists,
otologists or otorhinolaryngologists. The purpose of a medical evaluation is
to assure that all medically treatable conditions that may affect hearing are
identied and treated before the hearing aid is purchased.
Following the medical evaluation, the physician will give you a written
statement that states that your hearing loss has been medically evaluated and
that you may be considered a candidate for a hearing aid. The physician will
refer you to an audiologist or a hearing aid dispenser, as appropriate, for a
hearing aid evaluation.
The audiologist or hearing aid dispenser will conduct a hearing aid evaluation
to assess your ability to hear with and without a hearing aid. The hearing aid
evaluation will enable the audiologist or dispenser to select and t a hearing
aid to your individual needs.
36 37
Notice of Cancellation Technical Specifications
MAX OSPL90.......................... 118 dBSPL
HF Average OSPL90 .................... 112 dBSPL
HFA Full-on-gain ........................ 45 dBSPL
THD@ ..............................500 Hz 5.6%
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .800 Hz. 1.0%
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1600 Hz 0.5%
EQUIV INPUT NOISE ........................20 dB
BATTERY CURRENT DRAIN ................0.54 mA
YOU MAY CANCEL THIS TRANSACTION, WITHOUT ANY PENALTY
OR OBLIGATION, WITHIN 45 DAYS FROM THE DATE OF PURCHASE.
IF YOU CANCEL, ANY PROPERTY TRADED IN, ANY PAYMENTS
MADE BY YOU UNDER THE CONTRACT OR SALE LESS ANY
NONREFUNDABLE RESTOCKING FEE, AND ANY NEGOTIABLE
INSTRUMENT EXECUTED BY YOU WILL BE RETURNED WITHIN 10
BUSINESS DAYS FOLLOWING RECEIPT BY THE SELLER OF YOUR
CANCELLATION NOTICE AND ALL MERCHANDISE PERTAINING TO THIS
TRANSACTION, AND ANY SECURITY INTEREST ARISING OUT OF THE
TRANSACTION WILL BE CANCELLED. IF YOU CANCEL, YOU MUST
RETURN TO THE SELLER, IN SUBSTANTIALLY AS GOOD CONDITION
AS WHEN RECEIVED, ANY GOODS DELIVERED TO YOU UNDER THIS
CONTRACT OR SALE. TO CANCEL THIS TRANSACTION, MAIL OR DELIVER
A SIGNED AND DATED COPY OF THIS CANCELLATION NOTICE OR ANY
OTHER WRITTEN NOTICE, OR SEND A TELEGRAM, TO MDHEARINGAID,
917 W. WASHINGTON BLVD, SUITE 202, CHICAGO, IL 60607 NO LATER
THAN MIDNIGHT OF THE 45TH DAY AFTER THE INITIAL TRANSACTION. “I
HEREBY CANCEL THIS TRANSACTION,” SIGNED:
(Buyer’s Signature) (Date)
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