The 88-key Casio CDP-100 Digital Piano gives you plenty of grand piano sound and feel, thanks to its carefully sampled grand piano sound and scaled hammer action. With the Casio HL Sound Source and naturally scaled hammer action—with 3 levels of touch sensitivity—you get a realistic and satisfying piano experience in a portable, affordable digital keyboard. The Casio CDP-100 offers 5 sounds (including stereo grand piano) with 32-note polyphony, 8 digital effects, 5 demo songs, layer and transpose functions0, a speaker system, MIDI I/O, plus headphone and sustain pedal jacks. Casio includes a sustain pedal with the CDP-100 digital piano keyboard.