Equipped with dual high-tech wireless microphone with vocal support. Microphone approximate working distance is 300 ft. Built-in anti-howling, and anti-feedback with 4 level selection. Built-in music exciter which will add high-end harmonics to your vocal. Super strong dynamic tracing ability providing a perfect sound regardless far or near distance. DSP Digital Sound Processor. Touch Screen Front Display for fast and easy input selection, from volume control to effects such as Reverb, Echo, Delay, Repeat.. Built-in USB Port Input. Built-in 5.0 Audio Bluetooth receive for fast streaming from smart devices like iPhone, iPad, Smart TV, Computer… Digital Optical Input for Smart TV connection to sing karaoke on YouTube. 3 HDMI 2.0 Inputs & 1 HDMI ARC Output to connect to a karaoke player or a Google Chromecast for wireless streaming from phones to TV. 2 Rear 1/4 Microphone Inputs with Gain Control. Banana Plug Speaker Connectors. L/ R REC Audio Output. Amplifier Dimension: 17Wx12D x4H (inches). Frequency response: 20Hz-30kHz, ±1.5dB. Balance Input Impedance: 10k? Rated Output power 8 ohm 1 kHz degree of separation: >70dB. Damping factor f=1KHz 8 OHMS: >240.