the other is the audio source or the audio cable (the audio cable makes it more likely to generate background noise)
6V Lithium Battery (included)
Video pro mode
Language: English French German Spanish Italian etc multilateral languages
Charging time: 2 hours
RETEVIS PC28 FTDI Chip USB Programming Cable Write Frequency Line, PC28 Other Case the other is the audio1. USB programming cable, plug and play. 2. FTDI chip, good compatibility, no need to worry about the driver. 3. The cable is soft, strong and durable. 4. Connector type: Kenwood 2 PIN standard A4 USB adapter 5. Internal integration: FTDI 232 6. Material: PU wire, ABS 7. Working voltage: DC 5V+ 0. 5V 8. Support system: WinXP 7 8 10 Linux Mac OS X Android 9. Cable length: 92cm 10. Suitable for Retevis H777, RT7, RT1, RT21, RT22, RT24, RT23, RT26, RT5,