Specifications: Output power:30WT.H.D:<0.1%Frequency Responses:50Hz-20KHz ±3dBAudio input:Wireless receiver,TYPE(or option DVD/CD,USB), Wire mic, External Audio sourceSpeaker:6.5"woofer + 3" tweeterPower and Voltage:AC220V50HzRechargeable battery:2X12V/5AhBattery available time:5hours(Amplifier);4 hours(TYPE)Wireless Receiver:VHF210MHz-270MHz/ UHF 400MHz-850MHzOptional accessories:Collar clip/hand-held wireless mic/headset micWire mic:All kinds of mic