1、61 KEYS STANDARD PIANO： 61 keys hand roll piano for all ages with 61 keys (A1‑C9) standard piano. 128 tones, 128 rhythms, 14 demo songs. 2、MULTIFUNCTIONAL DESIGN: Roll up keyboard piano supports easy recording, editing, playback, sustain, vibrato, teaching, and chord functions. 3、SUPPORTED DEVICES: Hand roll piano comes with speakers for independent playing, supports external sound or headphones, and can be connected to an external sustain pedal. 4、POWER 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. 5、LED DIGITAL DISPLAY: 61 keys roll up keyboard piano supports MIDI output and can be used with computer or tablet with LED digital display. Item Type: 61 Keys Roll Up Keyboard Piano Material: Natural Silicone, ABS Color: Black Output Power: 500mW Power Supply Mode: 1. Built In Lithium Battery Power Supply 2. External USB Power Supply Battery Type: Built In 1100mAh Lithium Battery (Included) 1 x 61 Keys Roll Up Keyboard Piano 1 x Power Cord 1 x Adapter 1 x Instruction Manual