
User’s Manual
Contents
1. Introduction ................................................................... 1
3. Using the Monitor ........................................................... 4
3. Maintenance ................................................................ 12
4. Troubleshooting ........................................................ 13
5. Specifications ............................................................ 14
6. Electromagnetic Compatibility ........................................ 17

1
1. Introduction
1.1 Intended Use
This product is intended to be used for measuring, displaying
and storing of pulse oxygen saturation (SpO2) and pulse rate in
home or healthcare facilities environment.
The data and results provided by this device are for pre-check
screening purpose only and cannot be directly used for
diagnostic or treatment.
Warnings and Cautionary Advices
Do not use this device during MRI examination.
Never submerge the device in water or other liquids. Do not clean the
device with acetone or other volatile solutions.
Do not place this device in pressure vessels or gas sterilization device.
Vital signs measurements, such as those taken with this device,
cannot identify all diseases. Regardless of the measurement taken

2
using this device, you should consult your doctor immediately if you
experience symptoms that could indicate acute disease.
Do not self-diagnose or self-medicate on the basis of this device
without consulting your doctor. In particular, do not start taking any
new medication or change the type and/or dosage of any existing
medication without prior approval.
Use only cables, sensors and other accessories specified in this
manual.
Prolonged continuous SpO
2
monitoring may increase the risk of
undesirable changes in skin characteristics, such as irritation,
reddening, blistering or burns.
Check the SpO
2
sensor application site every 6-8 hours to determine
the positioning of the sensor and the circulation and skin sensitivity of
the patient. Patient sensitivity varies depending on medical status or
skin condition. For patients with poor peripheral blood circulation or
sensitive skin, inspect the sensor site more frequently.
Functional tester cannot be used to assess the accuracy of a SpO
2
sensor or a device.

3
This device is designed to determine the arterial oxygen saturation
percentage of functional hemoglobin. Factors that may degrade pulse
oximeter performance or affect the accuracy of the measurement
include the following:
- excess ambient light
- excessive motion
- electrosurgical
interference
- blood flow restrictors
(arterial catheters, blood
pressure cuffs, infusion
lines, etc.)
- moisture in the sensor
- improperly applied sensor
- incorrect sensor type
- poor pulse quality
- venous pulsations
- anemia or low hemoglobin
-concentrations
- cardiogreen and other intravascular dyes
- carboxyhemoglobin
- methemoglobin
- dysfunctional hemoglobin
- articial nails or fingermail
polish

European authorized representative
CE Marking indicating conformance to EC
directive No. 93/42/EEC concerning medical
devices.
MRI unsafe. Presents hazards in all MR
environments as device contains strongly
ferromagnetic materials.
Indicate separate collection for electrical and
electronic equipment (WEEE).
Protected against spraying water and

against access to hazardous parts with a
tool, per IEC 60529.
Follow Instructions for Use.
1.3 Unpacking
The package includes the following items:
Main Unit × 1
SpO
2
Sensor × 1
Charging Cable × 1
User’s Manual × 1
If any item on this list is missing or damaged, contact the seller.

4
3. Using the Monitor
2.1 Charging
Connect the device to a standard USB charging port with the
provided charging cable. Charge the battery fully before
using to get an overnight recording.
2.2 Power On/Off
Press the button to power on the device.
Press the button for three seconds to power off the device
normally.
Press the button for five seconds to power off the device
forcedly if necessary.
2.3 Wearing the Monitor
1. Wear the monitor on the left wrist.
2. Connect the sensor cable to the device.

5
3. Slide the ring sensor into the thumb as
pictured.
4. Power on the device and choose the
proper operation mode per your
application. After a few seconds, the
device will run the mode you set and your
readings will begin appearing on the
device screen.
5. Press the button can change different screens.
Note:
The monitor can also work as a clock and pedometer
without ring sensor, and the steps will restart counting after
the ring sensor plugged in.
Please avoid excessive motion for the sensed finger
during recording and avoid any strong ambient light
condition.

6
2.4 Displays
Press the button can switch different displays during recording.

7
2.5 Operation Mode Navigation
The monitor has two operation modes: Sleep Mode and
Monitor Mode. Press the button during the icon flashing to
switch between two modes.
Real-time Wireless
(Dashboard)
When SpO2 is
lower than
threshold set
When SpO2 is lower
than threshold set
Or when step goal is
met
On when the screen
lights up

8
2.6 Tracking and Recording the Vital Signs
After the mode has been chosen, the SpO2 and pulse rate will
be displayed on the screen. The SpO2, pulse rate and motion
data will be automatically stored in the monitor with 2s interval.
The device can store maximum 4 records. The oldest record
will be overwritten when the 5th record is coming in.
2.7 Smart Vibration
The monitor will monitor the SpO2 level and steps during the
recording. If the vibration is ON, the vibrator in the sensor will
be activated when the SpO2 fall below the pre-set value
(Threshold) or meet steps goal. The vibration will stop when the
SpO2 reading go back to normal range, or you can press the
button to stop it.

9
2.8 Establishing Bluetooth Connection
The device Bluetooth will open automatically only when the
screen lights up.
To establish Bluetooth connection,
1. Ensure the monitor screen is on to keep the Bluetooth
enabled.
2. Run the Check O2 app and enable the phone Bluetooth
as below.

10
3. Choose the right Device ID from the device.
2.9 Using Real-time Wireless Dashboard
After Bluetooth connection established in Monitor Mode, touch
the Dashboard icon in the app, then your phone / tablet
will show real-time SpO2, PR and Steps.
2.10 Completing the Recording
There are two ways to complete the recording:
Take off the sensor and it will power off later

11
automatically, or
Press the button for 3s to power off the monitor.
2.11 View Results and Settings on Mobile App
Download the Check O2 app from the Apple APP Store or
Google Play Store and then install it.
With the APP, you can:
Review all measurement and analysis results with
detailed data plots,
Change the settings of the monitor,
Update the monitor,
Manage the data in the cloud.
2.12 Using the Cloud
1. Touch the Cloud icon in the up right corner of the app,
and then create a cloud account.
2. Sign in your account in the APP.

12
3. Data will be updated to the cloud automatically or manually
based on your setting.
3. Maintenance
3.1 Care and Cleaning
Clean the device by carefully swabbing the device surface with
a soft cloth swab with water or alcohol.
3.2 Firmware Update
1. Connect the monitor with the APP.
2. Enter the APP, visit Device Device updateUpdate.
check the version and start an update if you want.
3.3 Battery
To keep the battery in good condition, charge the battery every
6 months when the monitor is not in use.

Charge battery and
try again.
Please contact your
local distributor.
The app
cannot
find the
device.
The Bluetooth of
your phone is off.
Turn on the
Bluetooth in the
phone.
The device
Bluetooth is off in
Sleep Mode.
Press the button,
the Bluetooth will be
turned on when the
screen lights up.

EC Directive
MDD, 93/42/EEC
Degree protection
against electrical shock
Relative humidity
(noncondensing)
Degree of dust & water
resistance

Rechargeable lithium-polymer
battery
Sleep Mode: > 10 hours
Monitor Mode: > 5 hours
Meet standards of ISO 80601-261
Measurement accuracy verification: The SpO2 accuracy
has been verified in human experiments by comparing with

arterial blood sample reference measured with a COoximeter. The pulse rate accuracy has been verified by
Emulator. Pulse oximeter measurement are statistically
distributed and about two-thirds of the measurements are
expected to come within the specified accuracy range
compared to CO-oximeter measurements.
80-100%:± 2%, 70-79%:± 3%
PR range
± 2 bpm or ± 2%,whichever is
greater
Red/Infrared: 3mW max. avg.

iOS 9.0 or above, iPhone 4s/iPad
3 or above
Android 4.4 or above, with
Bluetooth 4.0 BLE
6. Electromagnetic Compatibility
The device meets the requirements of EN 60601-1-2.
Warnings and Cautions
Using accessories other than those specified in this manual may result in
increased electromagnetic emission or decreased electromagnetic immunity of
the equipment.
The device or its components should not be used adjacent to or stacked with

18
other equipment.
The device needs special precautions regarding EMC and needs to be installed
and put into service according to the EMC information provided below.
Other devices may interfere with this device even though they meet the
requirements of CISPR.
When the inputted signal is below the minimum amplitude provided in technical
specifications, erroneous measurements could result.
Portable and mobile communication equipment may affect the performance of
this device.
Other devices that have RF transmitter or source may affect this device (e.g. cell
phones, PDAs, and PCs with wireless function).
Guidance and Declaration - Electromagnetic Emissions
The Health Monitor is intended for use in the electromagnetic environment specified below. The
customer or the user of the device should assure that it is used in such an environment.
Electromagnetic environment –
guidance
The device uses RF energy only for
its internal function. Therefore, its RF
emissions are very low and are not
likely to cause any interference in
nearby electronic equipment.
The device is suitable for use in all

Harmonic emissions
IEC61000-3-2
establishments, including domestic
establishments and those directly
connected to the public low-voltage
power supply network that supplies
buildings used for domestic
purposes.
Voltage Fluctuations / Flicker
Emissions IEC 61000-3-3
Guidance and Declaration - Electromagnetic Immunity
The Health Monitor is intended for use in the electromagnetic environment specified below. The
customer or the user of the Health Monitor should assure that it is used in such an environment.
Electromagnetic
environment guidance
Electrostatic
discharge (ESD) IEC
61000-4-2
± 6 kV contact
± 8 kV air
± 6 kV contact
± 8 kV air
Floors should be
wood, concrete
or ceramic tile. If
floors are
covered with
synthetic material,
the relative
humidity should
be at
least 30 %.
Electrical fast
transient/burst
IEC 61000-4-4
± 2 kV for power
supply lines
± 1 kV for
input/output lines
± 2 kV for power
supply lines
± 1 kV for
input/output lines
Mains power
quality should be
that of a typical
commercial or
hospital

line(s)
± 2 kV line(s) to
earth
line(s)
± 2 kV line(s) to
earth
Voltage dips, short
Interruptions and
Voltage variations on
power supply input
lines
IEC 61000-4-11
<5 % UT
(>95 % dip in UT)
for 0.5 cycle
40 % UT
(60 % dip in UT)
for 5 cycles
70 % UT
(30 % dip in UT)
for 25 cycles
<5 % UT
(>95 % dip in UT)
for 5 s
<5 % UT
(>95 % dip in UT)
for 0.5 cycle
40 % UT
(60 % dip in UT)
for 5 cycles
70 % UT
(30 % dip in UT)
for 25 cycles
<5 % UT
(>95 % dip in UT)
for 5 s
Mains power
quality should be
that of a typical
commercial or
hospital
environment. If the
user of our
product requires
continued
operation during
power mains
interruptions, it is
recommended
that our product
be powered from
an uninterruptible
power supply or a
battery.
Power frequency
(50/60 HZ) magnetic
field IEC 61000-4-8
Power frequency
magnetic fields
should be at levels
characteristic of a
typical location in
a typical
commercial or

Note: UT is the AC mains voltage prior to application of the test level.
Guidance and Declaration - Electromagnetic Immunity
The Health Monitor is intended for use in the specified electromagnetic environment. The
customer or the user of the Health Monitor should assure that it is used in such an environment
as described below.
Electromagnetic environment –
guidance
3 Vrms 150
kHz to
80 MHz
outside ISM
bands
3 Vrms 150
kHz to
80 MHz
outside ISM
bands
Portable and mobile RF
communications equipment should be
used no closer to any part of the
system, including cables, than the
recommended separation distance
calculated from the equation
appropriate for the frequency of the
transmitter. Recommended
separation distances:
Recommended separation distances:
80 MHz ~ 800 MHz:

Where, P is the maximum output
power rating of the transmitter in watts
(W) according to the transmitter
manufacturer and d is the
recommended separation distance in
meters (m).
Field strengths from fixed RF
transmitters, as determined by an
electromagnetic site survey a, should
be less than the compliance level in
each frequency range b.
Interference may occur in the vicinity
of equipment marked with the
following symbol:
Note 1: At 80 MHz to 800 MHz, the separation distance for the higher frequency range applies.
Note 2: These guidelines may not apply in all situations. Electromagnetic propagation is affected
by absorption and reflection from structures, objects and people.
a
Field strengths from fixed transmitters, such as base stations for radio (cellular/cordless)
telephones and land mobile radios, amateur radio, AM and FM radio broadcast and TV broadcast
cannot be predicted theoretically with accuracy. To assess the electromagnetic environment due
to fixed RF transmitters, an electromagnetic site survey should be considered. If the measured
field strength in the location in which the device is used exceeds the applicable RF compliance
level above, the device should be observed to verify normal operation. If abnormal performance
is observed, additional measures may be necessary, such as re-orienting or relocating the device.
b
Over frequency range 150kHz to 80MHz. For Resp field strength should be less than 1V/m.

Recommended separation distances between portable and mobile RF
communications equipment and the device
The Health Monitor is intended for use in an electromagnetic environment in which radiated RF
disturbances are controlled. The customer or the user of the Health Monitor can help prevent
electromagnetic interference by maintaining a minimum distance between portable and mobile
RF communications equipment (transmitters) and the monitor as recommended below, according
to the maximum output power of the communications equipment.
Rated max.
output power of
transmitter (W)
Separation distance according to frequency of the transmitter (m)
For transmitters rated at a maximum output power not listed above, the recommended separation
distance d in metres (m) can be estimated using the equation applicable to the frequency of the
transmitter, where P is the maximum output power rating of the transmitter in watts (W) according
to the transmitter manufacturer.
Note 1: At 80 MHz and 800 MHz, the separation distance for the higher frequency range applies.
Note 2: These guidelines may not apply in all situations. Electromagnetic propagation is affected
by absorption and reflection from structures, objects and people.

Shenzhen Viatom Technology Co., Ltd
4E,Building 3, Tingwei industrial Park,
Honglang North 2nd Road, Baoan, 518100
Shenzhen, P.R.China
www.viatomtech.com
info@viatomtech.com
MedNet GmbH
Borkstrasse 10, 48163 Muenster, Germany
Tel:+49 251 32266-0 Fax:+49 251 32266-22
PN:255-00917-00 Version: A
Contents of this manual are subject to changes without prior
notice.
© Copyright 2016 Shenzhen Viatom Technology Co., Ltd. All
rights reserved.