J-DEAL&reg; Portable Foldable Bluetooth Keyboard Ultra-slim Mini Wireless Keyboard for iOS (Mac) Android Windows PC Tablet Smartphone Built in Rechargeable Li-polymer Battery (White) Tri-folding design in pocket size plus lightweight feature, convenient to carry anywhere; Ergonomic design brings better touch feeling Aluminum alloy texture, durable to use; Quite, low profile keys, comfortable typing experience Built-in Broadcom Bluetooth module, perfectly compatible with IOS, Android and Windows system Full auto power on/off and sleep mode design as well as built-in rechargeable lithium battery, energy-saving and long lifespan Up to 10 meters operating distance---can work or play in more places like your comfy couch, flexible to operate