Singtronic KSP-4000Pro Professional 4000W Digital Karaoke Sound Processor Amplifier. Built-in Optical, Bluetooth, HDMI-ARC, Anti-Howling & Digital Equalizer. Anti-Feedback & Digital Sound. 3 Inches Touch Screen Monitor. Newest Model: 2022 Improved HDMI ARC for “Upstream” and “Dowstream” Signal over HDMI Port on TV (Perfect for Youtube Streaming Karaoke). Max Power Output: 2000W + 2000W. Built in Anti-Howling & Feedbackl Suppression. Digital Optical / Coax Audio Input (Connect directly from any Smart TV for Youtube Karaoke). 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). Banana Plug Speaker Connectors. DSP Digital Sound Processor. 115/230 Voltage for Worldwide Compatible. Built-in BBE Sonic Maximizer for both vocal and music. Singtronic KSP-4000Pro Professional 4000W Karaoke Amplifier. Free: 2 x UHF Professional Wireless Microphone with Anti-Howling & Feedback Suppressor. Note for overseas customers: This is an electronic product designed for use in the USA.