Feature Noble designed with touching screen display ,optional Chinese / English language ;User could set the menu on the screen, very easy to operate . Built-in wireless microphone (optional),power amplifier , with professional karaoke effect . Dual karaoke chip makes frequency to be staggered and out of sync ,effectively prevent feedback , noise and other problems , to have a satiation and Natural voice Music , microphone , effect with starting up VOL setting and maximum VOL locked function .support One-key factory reset. High quality circuit board using micro control technology , The service life is longer than that of ordinary boards . Power amplifier support MP3 play , be available to listen any time the songs which already downloaded . Built-in 8 different optional scene mode . ARC audio signal pass back function. USB interface for toning software . High fidelity, large dynamic power amplifier ,super stability ,very full power . Interface configuration HDMI2.0 , 4CH HDMI input and 1CH HDMI output .(optional accessory) Built-in 2 pcs high-end wireless microphone .(optional accessory) 1 digital optical input interface . 2 groups analog stereo input interface (VOD,DVD) 2CH external microphone input interface . Built-in 5.0 Bluetooth lossless player and MP3 played interface . USB interface for toning software . 2CH speaker output interface.