wireless headphone Specifications:
Communication Level: Mono
Receiving Frequency: 88~108MHz
Transmission Frequency: F1: 85.5MHz / F2: 86MHz
Frequency Response: 20~20, 000Hz
Sensitivity(S. P. L): 105dB3dB/mW(at 1KHz)
Power supply:
- Headphone: DC 3V (2x1.5V AAA batteries)
- Transmitter: DC 3V (2x1.5V AAA batteries)
Signal/Noise Ratio: >60dB
Maximum operation distance: 30m, 360