1. Multi selectable frequencies for transmitter.
2. Dynamic display of audio level for transmitter.
3. No interfere between two transmitters because the transmitting frequency is adjustable.
4. The headphone can be used as a high-fidelity stereo wired headphone.
5. Automatic power on/ off for transmitter.
6. Automatic mute function for headphone.
1. Operation distance: >50 meters (360-degree). 2. S/N ratio: >60dB. 3. Power supply: 2 x AAA battery.