$57.99 VocoPro Launches World's First Digital Input Karaoke Mixer with Wireless Microphones Designed 
Vocopro KaraokeDual Tablet/Smart TV Karaoke Machine System w/ (2) Wireless Mics | eBay
Sound Town 16 Channels Wireless Microphone Karaoke Mixer System with Optical (Toslink), AUX and 
