Power supply: 1)AC 110V/220V/230V/240V-1.0A 2)External: DC12=1A 3)DC1.5V X 6AA batteriesInput: One wired microphone input, one AUX input Built in features: one wireless microphone(handheld,lepel mic or headset mic option); DC 8.4V rechargeable battery charger.) Peak of music power: 25 watts max Speaker: one full range 4Ω4 speaker T.H.D: <5% Wireless service range: 35M max in VHF Frequency channel: single channel Dimensions: 150X99X153mm Gross weight: 1.7kgs