Platinum Karaoke - U 20 wireless Mics

Channel: 2 CH Frequency Range: 640 MHz-690 MHz Frequency Response: 50Hz-16KHz+3db Dynamic Range: >100db T.H.D: <0.5% S/N Ratio: >90db Operating Range: >20m Transmiter: Adjustment Mode: FM Image Controlment: >50db Max Deviation: <75KHz Power: DC 2.4~3.0V Receiver: Sensitivity: 2.0V S/N Ratio: >90db Distortion: <0.5% Output: Balanced Output, 6.35mm Mixed Output Power: DC 12V 200ma