Can play MP3/FM,With a display,remote control Built-in two pieces of 12V/2.2AH rechargeable battery with charger & 220V AC switching power supply.(automatic charging management) Wired/Wireless Microphone can be use at the same time Specifications and Technical data Power source:AC220V/50Hz DC±12V (Built-in rechargeable batteries (12V /1.2AH) Frequency Response:VHF180-278MHz Oscillating Mode:±0.005% quartz control phase locked Wireless effective range:50 meters Channel:Single wireless channel Peak power:75W Dimensions(H.W.D):230*160*320mm