Features Specifications:Sell UHF microphone  Specifications  Carrier Frequency:UHF520-900MHz Channel Total: 2Channels Dynamic Range: More than 110dB Total Harmonic Distortion (T.H.D.): Less than 1% Frequency Response: 80Hz-15kHz(±3dB) S/N Ratio: More than 90dB Valid Distance: (80-100)m, depending on the circumstance Handing Microphone Power Requirement: ≤10mW Frequency Vibration Mode: PLL Modulation Mode: FM Image and Spurious Rejection: More than 50dB Border Upon Channel Rejection: Less than 75kHz Voltage: 9V (6F22) Fixed Receiver Sensitivity:12dBuV (80dBuV) Sensitivity range:12-32dBuV RF aquelch: more than 75dB Output: Balance output :0-0.5V/600  Audio output:0-0.5V/5k Power Supply: DC 12-15V