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 2200mAh Lithium Battery (Included) Package List 1 x Roll Up Piano 1 x Power Cord 1 x Adapter 1 x Sound Extension Pedal 1 x Manual You need to lay flat when practicing the pianoPlease note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering. 188 KEYS: Portable roll up piano is designed for all ages, and has 88 keys (A1 to C9), with Bluetooth MIDI function for APP connection, and is very convenient. 2MULTIPLE TONES: Roll up digital piano with 128 tones, 128 rhythms, 15 demo songs with Bluetooth connection and microphone and sound input function, and you can play different music. 3MULTIFUNCTION: Portable electric piano with recording, editing, playback, extension, vibrato, teaching, chords, reset, shift function, tone digital direct selection key etc. 4LED DISPLAY: Portable piano with LED digital tube display, independent playing with its own speaker, support external sound or headphones and external extension 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.