Singtronic is one of the Leading companies in the karaoke industry that makes high end quality digital echo key pitch control karaoke mixers, processor & pre-effects built in 3.5 Touch Screen LCD Monitor with many Digital inputs like Optical, 4K HDMI and HDMI-Arc with Bluetooth Function are offer online at the best price on the net. Is 2 in 1 Digital Karaoke Mixer Processor that built with 2 x UHF Wireless microphone in one mainboard. Built in Anti-Howling & Feedback Supressional make karaoke purpose to another high level. Karaoke Mixer Processor is an revolution of the next karaoke generation. 3 Inches Touch Screen Monitor. Newest Model: 2021 Improved HDMI ARC for “Upstream” and “Dowstream” Signal over HDMI Port on TV (Perfect for Youtube Streaming Karaoke). Built in 2 x UHF Wireless Microphone System. Built in Anti-Howling & Feedbackl Suppression. Digital Optical / Coax Audio Input (Connect directly from any Smart TV for Youtube Karaoke). XLR Output (Left, Right, Center, Subwoofer). Built Digital EQualizer Individual Control: Music, Microphone & Effect. Built-in MP3 Player Module. Bluetooth Function send/receive from any device (Iphone, Ipad, Android, Youtube, Karaoke Apps). 4 Audio Inputs: DVD/VOB/USB/Bluetooth Function. 3 HDMI Inputs & 1 HDMI Output. 2 Rear 1/4 Microphone Inputs. USB Port MP3 & Playback. Master Effect Volume (Echo, Delay, Repeat, Reverb & High, Low). DSP Digital Sound Processor. 115/230 Voltage for Worldwide Compatible. Built-in BBE Sonic Maximizer for both vocal and music.