The power does not turn on

Check the battery level and charge it.

Cannot make a call with theHBS-780

If the mobile phone does not support headset and hands-free functions,you cannot use the calling features.Check the battery level and charge it

Cannot connect theHBS-780 to mobile phone

Check whether the HBS-780 is turned on.Check whether the HBS-780 is in Search mode.
- Simultaneously press and hold the Call button and slide thePower switch to the ON position to put the HBS-780 in Search mode

The sound is low

Control the sound level of the device connected to the HBS-780.