Input: 3 wired microphone inputs & Mic3 has priority function & 1 balance input &2 routes four RCA jacks for 2 AUX inputsOutput: one video output & one route two RCA jacks for one Aux output Built in features: CD/VCD//AM/FM/cassette player/USB slot/SD card slot,Two wireless microphones(handheld,lepel mic or headset mic option. DC 8.4V rechargeable battery charger.With tripod stand jack. Built in DC 12V-10AH X2pcs rechargeable batteries. Built in DC-DC power boost(PWM circuit). Built in 30Hz low cut circuit RMS: 50 watts max Frequency response: 40Hz-20KHz Speaker: one 4Ω10 woofer and one 4Ω 2.5 horn T.H.D: less than 1% Wireless service range: 35M max in VHF Frequency channel: Dual channels Dimensions: 320X410X610mm Gross weight: 25.5kgs