This innovative Bluetooth Sliding Keyboard & Case for the iPhone 4 is much more convenient and easier to use than the built-in on-screen iPhone keyboard. This model possesses a material integrity and quality higher than other generic models on the market. The smooth hard shell case is attached to the keyboard which slides out from behind it. Simply insert the iPhone 4 into the case, then pair the devices and the keyboard will be ready for use. The iPhone 4 fits securely into the case allowing easy access to the keyboard when needed. The slide-out Bluetooth keyboard is powered by a USB rechargeable lithium battery allowing the keyboard to be recharged in any USB port.