Specification Power:DC 5V Bluetooth:4.0 Battery:Built-in lithium-ion Battery capacity:600mAh (2 hours charge time,10 hours play time) Connected device:iOS 7, Android 4.2 + system Age rage:3+ Features This mini bluetooth piano has 49 responsive keys and plays sound right from your phone or tablet so you can make music on the go Pairs with 3 apps from Apple Store or Google Play and connects to your smartphone or tablet to play and practice anywhere Choose from a vast library of songs and various teaching programs on the apps Rolls up and folds easily with a flexible silicone design so it can be transported in a handy carrying bag Includes a USB charger for convenient charging, and a carrying bag for portability KEYBOARD DIMENSIONS: 29.5″(L) x 4.75″(W) x 0.75″(H) About 3 exclusive Applications Panda Piano-Fruit PartyThis app uses fun and colorful graphics to teach children to play simple songs Star Piano This app uses 6 different methods to teach you how to play – rhythm,listening, scales, chords, sheet music, and songs Pop piano: This app uses the“waterfall” method to teach you how to play music from a vast catalogue of popular songs Package Includes: 49 keys roll up piano Mesh Carrying Bag USB power cable Instruction Manual