Andoer Portable 88 Keys Silicone Flexible Roll Up Piano Foldable Keyboard Hand-rolling Piano with Battery Sustain Pedal (US plug) Standard 88 simulation keys (A1-C9), record, replay, automatic tonal modification function. With headphone/speaker/MP3/DC 5V/MIDI OUT interface. Edit MIDI file with visual piano roll. 140 kinds of tone, 128 kinds of rhythms, 30 demo songs. Digital display.