When device is on, press and hold the multi-function button for about 6 seconds, the red and blue indicator lights
flash alternately quickly, enter the pairing search mode, and the voice prompt "beep...beep". The passive pairing
mode is used to connect to Bluetooth devices such as mobile phones and GPS.
When device is on, press and hold the intercom button for about 6 seconds, the red and blue indicator lights flash
alternately slowly, enter the active search mode, and the voice prompt "beep...". Active search mode is used for
the intercom function connection between