GMYLE Nano Aluminum Ultra-Slim Bluetooth Wireless Keyboard for iOS Android Windows PC Surface Pro Tablet Smartphone Function Key Support with 3 different Systems: Android, iOS, Mac and Windows XP/Vista/7 Built-in rechargeable li-ion battery, charged through USB charging cable. Controls the charging automatically, effectively reduce the weight of keyboard Slim and portable, lighter and slimmer Scissor-Switch and Chiclet Keyboard Design 80 keys ultra-thin design