Check the listing for details. BMB KSP-50 Karaoke Processor with English Remote / Chinese Language Panel. Condition: New. Listed at 899.99 USD. New BMB KSP-50 digital karaoke processor with English Remote Control( Chinese Language front Panel - 110V-240V ) has Chinese & English software control via window computer, brand new unseal unit , has built in optical & RCA input, if you have any question please message us. BMB KSP-50 Digital Karaoke Processor The Karaoke Sound Processor is High Perfomance Mixer use the venue such like Karaoke Box , Home & ETC ,This Karaoke Processor is 1U Side design to mount at any 19'' equipment server Rack.This Karaoke Sound Processor have a addlitional features USB conenct to Laptop / Desktop Computer able Use Equalizer to set all sound clarity as you can ,indeed this karaoke Processor also have build in two different Multi FX , ECHO function & Reverb Function , its very useful for every karaoke Lover, this karaoke processor input connections available include Mono Plug (1/4 quarter inches ) for microphones and stereo RCA for music sources . it have build in the volume knob for every Microphone input with small switch in beside.