Amplicord 55X Mode D'emploi page 12

Environmental conditions of transport and storage
Temperature: + 5 ° to + 40 °;
Relative humidity: 15% -90% non-condensed without water vapor;
Partial pressure:> 50hPa;
Atmospheric pressure: 700hPa-1060hPa;
The battery has a duration of approximately 1 hour and 30 minutes
of continuous use and has a life cycle of approximately 1 and a half
years.
The life expectancy of the device is estimated to be around 10
years.
Troubleshooting
Problem
The device does not
vibrate.
Cause
The battery may be
low or dead.
Solution
Recharge or replace
the battery.