CellMACs iPhone 4/iPhone 4S Sliding Bluetooth Keyboard Case and Stand Combo - RED Bluetooth to connect your iPhone or iPad with bluetooth function Backlight to be able to use at night and/or when dark 50 key qwerty keyboard up to 90 degree viewing engle to be able to view at any positon 30 Pin connector, so you do not need to carry any other cable - works with your iPhone's charger