Yamaha PSR-SX900, Keyboard, 61 Velocity-sensitive keys, New FSB keyboard, 1337 Voices + 56 Drum /SFX Kits + 480 XG Voices, 525 Styles, 128-Voice polyphony, Keyboard parts up to Right 3, Assignable buttons, joystick and live controller, Vocal Harmony and Synth Vocoder functions, Expansion audio style, XG/GM/GM2/GS sound compatible, DJ styles, Arpeggio function, 1 GB internal expansion memory, Touch screen display, Audio link multi pads, Audio recorder/player in WAV and MP3 format, Pitch shift, Chord looper, Bluetooth audio, Headphone jack, Mic/Guitar input, MIDI in/out, USB to host, USB to device (2x), AUX input, MAIN output (L / L+R, R), SUB (AUX) output (1.2 (L / L+R, R), Sustain pedal connection, Speaker system with 2 x 15 Watt, Dimensions (W x D x H): 1017 x 431 x 139 mm, Weight 11.5 kg, Includes power adapter (PA-300C), owner's manual and music stand, Suitable video adapter: Article no. #431245# (not included), Suitable protective cover: Article no. #497394# (not included)