1. 2.4 G wireless headset ( stereo transmission / reception).
2. Frequency range: 2.403 - 2.480 MHz ( automatically frequency scanning).
3. Limitless users. Automatic frequency selection.
1. Power of receiver: 3V. 2. Operated on 2 x AAA batteries. 3. Transmitter: USB 5V. 4. Transmission distance: 12 - 15 M.