NO863 high frequency wireless headphone Parameter of transmitter 1.Transmitter frequency: 863.3/863.9/864.5MHZ 2.Transmitter power: below 10dBM 3.Frequency warp of transmitting: +/- 70KHZ 4.Transmitting distortion: above 50db 5.SNR: above 70db 6.Frequency response: 30~13000HZ 7.Voltage supply:12V DC 8.Work current: 120mA Parameter of Receiver 1.Receiving frequency: 863.3/863.9/864.5MHZ 2.Receiving sensitivity: -100dBM 3.Receiving SNR: above 70dB 4.Receiving distortion: above 50dB 5.Receiving range: above 100m 6.Voltage supply :1.8~3V, 2 AAA batteries 7Work current: 42mA 3D Surround infrared wireless headphone Parameter of transmitter 1.Transmitting frequency: Left track 2.3MHZ, Right track 2.8MHZ 2.Frequency warp of transmitting : +/- 50KHZ 3.Transmitting distortion: above 50db 4.SNR: above 70db 5.Available frequency: 30~15000HZ 6.Voltage supply:12V DC 7.Work current: 120mA Parameter of receiver 1.Receiving frequency: Left track 2.3MHZ, Right track 2.8MHZ 2.Receiving sensitivity: 30dBU 3.Receiving SNR: above 70dB 4.Receiving distortion: above 50dB 5.Receiving range: above 10m 6.Voltage supply :1.8~3V, 2 AAA batteries 7.Work current: 25mA