SF4
- SF4 User's Guide Location
- Fault Reset
- Making and Answering Calll
- Mobile Phone Pairing
- Powering On and Off
- FM Radio On/Off
- Intercom Pairing
- Factory Reset
- GPS Pairing
- Playing Music
- Charging
- Seek and Save Radio Station
- Two-way Intercom
- Checking the Battery Level
- Scan and Save Radio Station
- Remote Control Pairing
- Music Sharing
- Three-way Intercom
- Volume Adjustment
- Four-way Intercom