Universal Intercom mode
4 Riders Multi-Intercom
mode
Surround Monitoring mode
Battery power level
7. PHONE FUNCTION
Answering incoming call
Rejecting incoming call
Hanging up the call
Automatic answering
Holding the current call, answering an incoming call
While in calling, rejecting another incoming call
Last number redialing
& Speed dial
While being on the phone, switching device between
BiT-4
and Smart-phone
8. MUSIC MODE
Enter / Exit music mode
Music play / stop
Fast-forward / Rewind
Switching music between two paired Smart-phones
Music sharing
9. FM RADIO MODE
Entering / Exiting FM radio mode
Playing / Muting FM radio
Scanning channel up / down
Saving channel
Saved channel up / down