Features 1、[Premium Material] Hand roll up piano with standard 49 keys (A1 to C9), using premium silicone keyboard, safe and harmless, suitable for all ages. 2、[Multi Functional] This roll up piano has 16 tones, 6 demonstration songs, easy recording, editing, playing, sustain, vibrato, teaching, and chord functions. 3、[Compatible Devices] Independent playing with its own speakers, supports external speaker or headphones, multi platform access to devices, arranging and mixing. 4、[Easy To Use] This keyboard piano can be powered by external USB or plugged into 3 AAA batteries (not included). Support MIDI output, connect with computer or tablet. 5、[4D Surround Sound] Portable and smart foldable keyboard piano with 4D surround sound effect and heavy bass touching the heart. Suitable for travel, outdoor, home, school. Specification Item Type: Roll Up Piano Material: Natural Silicone, ABS Color: Black Output Power: 500mW Connected Devices: Support External Speaker, Headphones, Tablet Power Supply: USB Power Supply, 3 x AAA Batteries (Not Included) Power Supply Product Features: Record, Play, Start, Stop Package List 1 x Roll Up Piano 1 x Power Cord 1 x Manual