... saving 5. Waterproof, dustproof Feature:Built-in wireless buletooth 3.0 keyboardABS case protect your phone With back light button for night useSideslip keyboard, unique ... ,000 timesTemperature-20 - +55°CHumidity20%-50% Demension120*61*14mm Weight90g Bluetooth sideslip keyboard hard case for iphone 4/4s