
Table of Contents
Your Unison™Digital Hearing Aids ..................................1
Practical Solutions to Everyday Problems ......................2
Getting the Most Out of Your Unison
™
Hearing
Instruments..................................................................3
Using the Unison
™
Digital BTE Guide .............................4
Turning Your Unison
™
Hearing Aids On and Off..............5
Putting Your Unison
™
Hearing Instruments
on Your Ears .................................................................6
Feedback-Free Listening.................................................6
Operating Instructions....................................................7
Assistive Listening Devices.............................................9
Replacing the Battery ....................................................11
Caring for Your Hearing Aids.........................................13
Cleaning Your Unison
™
Hearing Aids.............................13
Warnings .......................................................................16
Troubleshooting Guide .................................................20
Warning to Hearing Aid Dispensers .............................23

Your Unison
™
Digital Hearing Aids
Hearing Healthcare Professional: _________________________
_____________________________________________________
Telephone: ___________________________________________
Model: _______________________________________________
Serial Number: ________________________________________
Replacement Batteries: Size 10 Size 13 Size 675
Warranty:_____________________________________________
Use Program 1 for: _____________________________________
Use Program 2 for: ____________________________________
Use Program 3 for: ____________________________________
Date of Purchase: ______________________________________
1

Practical Solutions to Everyday Problems
Congratulations on choosing your new BTE (Behind-theEar) digital hearing instruments. For 40 years, Unitron
Hearing has been committed to making life better for
people with hearing loss. This means a commitment to
developing high-quality hearing solutions that
incorporate special features to solve the everyday
problems and concerns you have with hearing loss and
hearing aids.
The best choice of hearing instrument is different for
everyone: it comes down to your individual hearing loss,
lifestyle, preferences and budget. The Unison
™
series
meets your unique needs with three high-quality digital
hearing instrument models. Your hearing healthcare
professional helped you choose the right Unison model
and style for your needs.
2

Getting the Most Out of Your Unison
™
Hearing Instruments
Adjusting to your new hearing instruments will take
some time. In the beginning it is important that you do
not use the hearing aids for longer than is comfortable.
Depending on your previous experience with hearing
instruments, a few hours a day may be enough and then
you can increase wearing time gradually. Once you have
become accustomed to your hearing aids, you should
wear them all day every day since infrequent use will
not permit you to adapt to your hearing aids and enjoy
their full benefits. The quicker you get used to the
everyday sounds around you, the less you will notice
that you are wearing hearing instruments.
3

Using the Unison
™
Digital BTE Guide
Refer to the table of contents for a complete listing of
the topics covered in this guide.
There are several different styles of BTEs available. The
diagrams below identify some of the components on
your hearing aids. Have your hearing healthcare
professional place a check beside the diagram that best
describes your BTE style.
4
Legend
1 Earhook
2 Slim Tube
3 Microphone and
Microphone Shield
4 Program Button
5 Volume Control
6 Battery Door/On &
Off Switch
7 Dome
8 Retention Piece
BTE with
Volume Control
BTE with
Slim Tube
BTE without
Volume Control
1
3
4
5
6
1
3
4
6
2
3
4
6
7
8

Turning Your Unison
™
Hearing Aids
On and Off
Your hearing aids have a three-position battery door
that acts as an off/on switch and that allows access to
the battery compartment.
To turn the hearing aid on, close the battery door fully.
Note: If the start up mute is activated, your hearing aids
will not turn on until the program button is pushed.
To turn the hearing aid off, partially open the battery
door. This position allows excess moisture to vent away
from the battery compartment.
Note: If you have a high
power BTE with a 675 battery, you also have an on/off
switch in the volume control.
To replace the hearing aid battery, fully open the battery
door for access to the battery compartment.
5
on off open
Note: When turning your
hearing aid on and off, grasp
the top and bottom of the aid
with your index finger and
thumb. Use your thumb to open
and close the battery door.

Putting Your Unison
™
Hearing
Instruments on Your Ears
BTEs with Slim Tubes
1. Place the hearing instrument over the top of your ear.
2. Hold the slim tube where it attaches to the dome and
gently push the dome into your ear canal. The slim
tube should lie flush against your head and not stick
out.
3. Place the retention piece in your ear so it rests at the
bottom of the opening of your ear canal.
4. Repeat steps 1-3 for your other ear if you wear two
hearing aids.
BTEs with Earhooks
1. Place the hearing instrument over the top of your ear.
2. Carefully insert the earmold in your ear. The earmold
should fit into your ear snugly and comfortably.
3. Repeat steps 1-2 for your other ear if you wear two
hearing aids.
6

Feedback-Free Listening
Your hearing aids may have an optional start up mute
that can be activated by your hearing healthcare
professional. If the start up mute is activated, your
hearing aids will not turn on until the program button is
pushed, even if the battery door is in the ON position.
The hearing aids return to the start up mute position
each time you turn your hearing aids on. This allows you
to insert your hearing aids without experiencing
whistling.
If you wear hearing aids now, you may have experienced
whistling from your hearing aids when you talk, chew,
use the telephone or hug someone. Unison’s feedback
technology dramatically reduces this uncomfortable
whistling before you or anyone else can perceive it.
7