SEK-88A Beginner 88-Key Electronic Keyboard Semi-weighted Key The Starfavor 88-key piano keyboard is equipped with semi-weighted keys which would bounce faster than full-weight keys reducing the sense of force it is a perfect choice for beginners. 128 Polyphony 128 Rhythms 80 Demos The electronic keyboard has 128 polyphony 128 rhythms and 80 demo songs allowing players to learn popular songs and practice chords. It also has a recording function which enables learners to record and playback performances while practicing. LED Display Screen The LED display will simply and clearly display the current tone rhythm sequence number and the current playing speed. Thin & Portable Weighing just 11 lbs this modern and stylish SEK-88A electric keyboard piano is always ready to play. There is also a carrying bag which is easy to take out so you can practice and perform everywhere. Dual Power Supply The electric piano keyboard can be powered by an included power adapter or four AA batteries so you can take it anywhere. External Device Interface Sustain pedal interface Mp3 input interface Earphones/speakers interface USB MIDI interface Specifications Keys: 88 Rhythm: 128 Timbres: 128 Polyphony: 128-note Demonstration Song: 80 songs Displays Screen: LED digital displays Output Port: 3.5mm headphone jack 3.5mm audio input 3.5 sustain keyboard pedal and USB-MIDI interface Battery Adaptation: 4 x 1.5v Produce Size: 47.2(L) x7.5(W)x2.4(H)Inches | 120(L) x 19(W)x 6(H)CM Item Weight: 11 lbs | 5 kg Package Include SEK-88A 88 key Electronic Keyboard x 1 Sustain Pedal x 1 Carry Bag x1 Power Supply x1 Key Sticker x1 Headphone x1