Yamaha PSR- Music Keyboard with DJ Voices – Has MIDI In Out For Computer Connectivity Instrument Voices Accompaniment Styles Built-In Songs Multi-Pads With Banks Of Musical Phrases To Use As Fill-Ins Stereo Speakers With Bass Ports Provide Exceptional Sound Quality Built-In Headphone Jack For Private Practice Requires D Batteries for portability not included or optional AC adapter Unit Size – W x H x D Includes music rest and song book more info