Features 1、PIANO FUNCTIONS: This hand roll up piano has 8 tones and 6 demonstration songs, with self guided recording function, learning function, and 6 levels volume adjustment. With 49 keys design, can produce softer standard tones. 2、BATTERY POWERED: This folding piano features a built in 450mAh lithium battery, equipped with a USB cable for charging. Automatically shuts down in 3 minutes without operation, reducing energy consumption. 3、BUILT IN SPEAKER: This portable roll up piano has high performance built in speaker, which can play songs to assist in practice when connected to a phone, and can sing when connected to a microphone. 4、MULTIFUNCTION INTERFACE: This folding electronic piano has multifunctional interface, supports MID, maintenance, and recording, USB, external speaker, headphone, and external power supply. 5、CONVENIENT USE: This flexible electronic keyboard can be rolled into a small size and placed in a bag for storage and carrying. Specially designed for kids and beginners, suitable for daily teaching and practice. Specification Item Type: 49 Key Roll Up Piano Material: Silicone, Plastic Power Supply: 450mAh Lithium Battery (Built in Battery) Application: For Kids and Beginners, Teaching, Practice Package List 1 x Roll Up Piano 1 x USB Charging Cable 1 x English User Manual