Yamaha PSR-280 Portable Keyboard with Dynamic 2-Way Speakers Portable Grand, Stereo Sampled Grand Piano Voice, Instant Piano Play Pianist Styles, Yamaha Education Suite (Y.E.S. 2) DJ Mode, Dynamic Filter, Touch Response, Reverb 2-Way Speaker System, Bass Boost System, Song Recording, One Touch Setting 32-note Polyphony, Digital Signal Processing (DSP), Advanced Wave Memory (AWM) MIDI, General MIDI