Specification Power:DC 5V Speakers:Built-in high quality speaker system Battery:Built-in Lithium-Ion Battery capacity:2000mAh Tone:128 options Demo Songs:15 options Rhythm:128 options Features The is our most premium model with intuitive touch-screen with standard size keys to emulate the feeling of playing on a real piano. This standard 88 keys roll up comes with premium built-in dual speakers. The Model comes with blue tooth connectivity, standard record/play features This roll up piano is made of premium silicone keyboard, nontoxic, wear resistance, soft and durable. The sounds very crisp, vibrant sound which just like a real piano. Perfect for making beats, tunes, adults and beginners. Package Includes: 88 keys roll up piano Foot Pedal Carrying Bag USB power cable Instruction Manual