Frequency: UHF650-698.5Mhz
Working current:180MA
Working power:0.72W
Min. working voltage:3.0V
Frequency repose:25-18KHz
Output impedance:<600
Stability:0.001%
S/N:>105dB
Working distance type:LCD
Microphone battery: AA Battery
Receiver built-in battery:Li-on rechargable battery(2000mAh)
Receiver working time: up to 8hours