SANOXY® iPhone Sliding Keyboard Case imply snap in your iPhone 4 (AT&T or Verizon), pair your device, and you"ve got a fully functional keyboard ready to slide out whenever you need it! Fits AT&T and Verizon iPhone 4, iPhone 4s SANOXY iPhone4 sliding keyboard case is a hardshell plastic case with a sliding bluetooth keyboard. It provides a physical keyboard for your iPhone while protecting it at the same time. - The built-in lithium battery can support 120 hours continuously typing after 4 hours charging. - The rubberized hard shell case gives your iPhone good protection and very stylish look - Only one connection between your iPhone and the case is needed upon the first time using. - Special keys featured for iPhone. Bluetooth Specification: Version 2.0 Operation Current: 3mAh Standby Current: 0.2mAh Operation Voltage: 3.7V Battery Type: 200mAh Lithium Battery Charging period: 4 hours (For the first time, please charge for 12 hours) Duration of Charged battery: 45 days Package Contents: - iPhone Sliding Bluetooth Keyboard Hardshell Case - USB Cable - Owner"s Manual Features: * Black color * Rubberized hard shell case * Sliding keyboard * Bluetooth wireless connectivity * Fits AT&T and Verizon iPhone 4 * Specialized keys for iPhone * Home button * Search button * Show/hide on-screen keyboard * Built-in rechargable Lithium battery * Charges over USB interface * Physical Features: * On/off switch * Connect button * USB mini