Yamaha P-140 Portable Digital Piano Keyboard Premium GHE (Graded Hammer Effect) Piano Action, 88 Keys, A1-C7 Tone Generator AWM, 3-layer Dynamic Stereo Sampling, Key-Off Samples, Stereo Sustain Samples (open-string effect with sustain pedal) Polyphony up to 64 notes 14 distinct voices each with 3 tonal variations 5 Different Reverbs, Chorus, Phaser, Tremolo, and Rotary Speaker