Item Type: 61 Keys Roll Up Keyboard 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 61 Keys Roll Up Keyboard Piano 1 x Power Cord 1 x Adapter 1 x Instruction 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. 161 KEYS STANDARD PIANO 61 keys hand roll piano for all ages with 61 keys (A1C9) standard piano. 128 tones, 128 rhythms, 14 demo songs. 2MULTIFUNCTIONAL DESIGN: Roll up keyboard piano supports easy recording, editing, playback, sustain, vibrato, teaching, and chord functions. 3SUPPORTED DEVICES: Hand roll piano comes with speakers for independent playing, supports external sound or headphones, and can be connected to an external sustain pedal. 4POWER SUPPLY: Portable roll up piano is powered by a rechargeable lithium battery and can be powered by an external DC5V power supply or mobile charger. 5LED DIGITAL DISPLAY: 61 keys roll up keyboard piano supports MIDI output and can be used with computer or tablet with LED digital display.