Item Type: Roll Up Piano Material: Natural Silicone, ABS Color: Black Output Power: 500mW Applicable Voltage: 100-240V Power Supply Mode: 1. Built in Lithium Battery Power Supply 2. External USB Power Supply Battery Type: Built in 1100mAh Lithium Battery (included) Package List 1 x Host 1 x Power Cord 1 x Adapter 1 x Sound Extension Pedal 1 x Manual You need to lay flat when practicing the piano. 1Universal to Use: Portable roll up piano for all ages; with 88 keys (A1C9) standard piano; with Bluetooth MIDI function for APP connection. 2Multiple Settings: Roll up digital piano with 128 tones, 128 rhythms, 14 demo songs with Bluetooth connection. 3Multifunction: Portable electric piano with recording, editing, playback, sustain, vibrato, teaching, chords, etc. 4Easy to Use: Portable piano with LED digital tube display; independent playing with its own speaker; support external sound or headphones; external sustain pedal is available. 5Power Supply: Digital piano can be powered by rechargeable lithium battery, external DC 5V power supply or mobile charging power supply; support MIDI output can be used with computer or tablet connection.