Yamaha PSR-420

Keyboard: 61 keys with velocity Polyphony: 28 notes ROM: 128 sounds, 100 rhythms, 8 drum kitsEffects: ambience, ensemble, sustain Power Consumption: 26 watts Dimensions: 933 mm x 372 mm x 127 mm Weight: 6.1 kg This keyboard is MIDI-enabled. This keyboard has built-in 6-watt stereo speaker(s). Batteries: D x 6