Feature: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 PianoMaterial: Silicone, PlasticPower Supply: 450mAh Lithium Battery (Built in Battery)Application: For Kids and Beginners, Teaching, Practice.Package List:1 x Roll Up Piano1 x USB Charging Cable1 x English User Manual