SPECIFICATION Power Unit Power Supply Loudspeaker Impedance Power RMS : AC 100-240V :1x12", 1x2.5" :40 :25W Frequency range Sensitivity :50HZ-18KHZ :600MV Distortion :<1% Input and Output : RCA Jack Battery Product Dimension : 34x27x52cm Weight of Product :5.92kg Material :12V6600mAH : Plastic Microphone unit Frequency Range S/N Ratio Battery :UHF 700 - 800 MHz :260dB :2x Battery AA