Aluminum Bluetooth Keyboard, Ultra-Slim 4mm Wireless Keyboard for iPad Air 2 / Air, iPad mini 3 / mini 2 / mini, iPad 4 / 3 / 2, Galaxy Tabs (Silver) 4mm Slim Aluminum Wireless Bluetooth keyboard Built-in rechargeable lithium battery, can interrupted work more than 10 hours Universal model, Support iOS/Android/Windows system Special function keys for music, volume, slideshow, home, search, etc Bluetooth operating distance: 10meters