Power supply: 1)AC 110V/220V/230V/240V-1.0A 2)External: DC12=1A 3)DC1.5V X 8AA batteries Inputs: One Φ6.35mm dynamic microphone input jack One Φ3.5mm condenser microphone input jack One AUX input jack. One USB input port & one SD card input port. Output: one Aux output Built in features: one wireless microphone(handheld,lepel mic or headset mic option.with USB/SD card slots.with IC play/record/repeat/delete functions.DC 8.4V rechargeable battery charger.) Peak of music power: 30 watts max Speaker: one full range 3Ω4 speaker T.H.D: <10% Wireless service range: 35M max in VHF Frequency channel: single channel Dimensions: 215X110X230mm Gross weight: 2kgs