Easy to use UHF Wireless Microphone systemReceiver Specs:Signal/Noise Ratio: -105dBBorder Upon Channel Rejection: >70dB T.H.D.: <1%Audio Output Level: 0-300 mVDimensions 6.8 x 5.3 x 1.7 inPower Supply: DC 5V (Type-C USB Power Adapter)Transmitter Specs:RF Output: >10 dBmModulation Type: FMMax Deviation: + 40 KHzSpurious Emission:> 55 dBcNominal Current Drain: <40mABattery Powered, Requires (2) x 'AA' Batteries -Each