Wireless Headset
Transmitter
*Radiate Frequency: FM 49.85MHz
*Radiate power: max120dB
*6F22(9V) battery, or used AC/DC adopter
*Audio input: ≤500mV

Headphone
*Size 2450 recharge Li-ion battery , AC/DC recharge adopter
*Battery recharge life: ≥300 cycle
*Receiver frequency :FM 49.85MHz
*Audio frequency response: 80HZ~15KHZ(+/-3dB)
*S/N: ≥45dB
*Out put power: ≥50mW
*Receiver distance: ≥40 meter(none impediment)