Features Specifications:SN-670 UHF wireless microphone  Technical Specification (Transmitter)hand-held Carrier Frequency:UHF730-865MHz Frequency stability:≤0.002% RF power output:30mW Current loss:≤120mA Use range:70m(ideal) Pickup:Dynamic or condenser Battery:1.5Vx2 Power life:8-10hour Outline:φ45*270mm (Receiver)desk-top Sensitivity:2uV(sinad=12dB) Spurious rejection:≥80dB Image rejection:≥80dB SNR:≥90dB AF output:0-300mV Receiving channel:Two channel Power:DC13-18V Power consumption:5W Outline:210*200*45mm