This is the iPhone case with a slide-out keyboard and illuminated keys that enable more tactile, accurate keystrokes in low ambient light. The lighted QWERTY keyboard has 42 keys (11 more than the iPhone's touchscreen keyboard). Its arrow keys allow faster cursor placement, the command and function keys provide easy access to editing shortcuts, and a shift button enables access to punctuation. When the physical keyboard is paired with an iPhone it prevents the touchscreen keypad from appearing, doubling the size of the viewable screen. The streamlined hard-plastic case enables unobtrusive storage and leaves the camera lens, volume and power buttons, and access ports uncovered. The rechargeable battery provides 6 hours of continuous typing after a four-hour charge using the included USB cable. Pairs with an iPhone via Bluetooth. Compatible with iPhone 4S and 4. 4 1/2" L x 2 1/3" W x 3/4" D. (3 1/4 oz.)