... Microphone jack; Ideal For: DJs, KJs, Hubs, Home entertainment, Karaoke enthusiasts, Schools, and Churches Features: USB & 3-in-one ... Multi-Audio, Multi-SubtitleOver 500 lines of Horizontal ResolutionProfessional Karaoke function with 12 step Key Control and 12 Step ... Tempo Control 13step output volume adjustment 7 music scene choices (Rock, Classic, Stadium, Disco, Plaza, Jazz and Normal)Reserved ...