1. Dual channel for two car audio sources.
2. Compatible with all vehicle's AV applications.
3. Auto mute and auto power off functions are available for headphones.
4. Effective range: up to 10m.
5. Ultralight weight design for comfortable wearing with adjustalbe headband.
6. Numbers of headphones can be used simultaneously in the car.
7. Personal volume control.
1. Carrier frequency: (1) A source: 2.8MHz (right) and 2.3MHz (left). (2) B source: 3.8MHz(right), 3.2MHz (left). 2. S/N ratio: >60dB. 3. Power supply: 2 x AAA batteries.