Startone MKR 61, Roll Up Keyboard, 61 Keys, 128 Sounds, 128 rhythms, 25 Demo songs, Digital display, Volume Control, Record and playback function, Tempo control, Single finger and multi-finger, Sustain and vibrato function, MIDI out, Audio in, USB charging port, Headphone output: 3.5 mm jack, Dimensions of control panel (W x H x D): 110 x 215 x 35 mm, Dimensions of keyboard (W x H x D): 900 x 166 x 8 mm, Weight: 986 g, Battery included (USB power supply: Article no. #278119# - not included)