Nevir NVR-TAB7DGBT S2 Manual De Usuario página 39

Note: When using FM radio, earphone should be inserted as antenna,
if no antenna, MID will can't receive radio frequency.
IV. Troubleshooting
1. What if the device is abnormal during operation?
Answer:
1). Reboot the device to see if it works OK.
2). Charge the device by the charger to activate the battery. Make
sure it has power before you operate it.
3). It is suggested to upgrade the OS of the device by professional.
2. Why the standby time is so short sometimes?
Answer: the use time of the battery is all depend on the temperature
and use instance. If the temperature is too high or too low, the use
time of the battery might be effected. It is suggest using the device in
normal temperature.
The using time is also affected by increased volume and frequently
operation.
39