File No.: QR-HC21-C-C09
Xiamen Linktop Technology Co., Ltd.
Page 10 of 17
use headphones with minimum impedance of 16 Ohm and bandwidth of at least 20 – 20KHz
during auscultation.
3.1.4 Turning the stethoscope off
If you do not use the stethoscope, you can press the stethoscope button to put it into sleep
mode. It is not necessary to turn it off after each use.
If it is necessary to turn off the stethoscope completely, it can be done by pressing and
holding the stethoscope button for 3 seconds. To turn on the stethoscope again, it is enough
to press and hold the stethoscope button for 3 seconds.
Note: If the stethoscope is not turned off when it is not in use, the stethoscope may run out of
battery power.
4. CLEANING AND MAINTENANCE
The stethoscope should be disinfected after each use. It should be disinfected using a cotton
pad or swab moistened with non-alcoholic disinfectant intended for medical products.
• Please take care not to flood the 3.5 mm jack socket with the disinfectant.
• Do not immerse the stethoscope in water or other cleaning liquids and do not clean it under
running water.
• Make sure that the water does not reach the inside of the stethoscope.
5. STORAGE, TRANSPORT AND OPERATION CONDITIONS
5.1 Storage and transport conditions:
Temperature: -20°C do 60°C
Relative humidity: 10% do 95%
Atmospheric pressure: 700 hPa ~1060 hPa
5.2 Operation conditions:
Temperature: 5°C to 40°C
Relative humidity: from 10% to 95%
Atmospheric pressure: 700 hPa ~1060 hPa
6.
TROUBLE SHOOTING
Malfunctions
Reason
Solution
APP cannot connect to
the device via
Bluetooth
Bluetooth is not in
pairing state
The device enters sleep mode, short press the
button to enter working mode.
The device is turned off, long press the button
for 3 seconds to turn on the device.
Incomplete sound
transmission via
Bluetooth
Wrong connection
distance
Keep the distance between the app and the
device within 2 meters
Bluetooth version is
low
Must use Bluetooth 4.2 or higher mobile phone
or tablet