1,Unique design, solid structure, 2,Portable, multi-languages available 3,Working time: 135Hours 4,Standy time: 90day Folding Protective Aluminium Bluetooth Keyboard for iPad 2 / 3 ... 5.0V Standby time:150 hoursOptional color: sliver black / silver whiteBritish keyboard:10 inch,82 keys,245*95mmBattery: standby ... (W)*11.6(H) mmWeight: 295±30g Aluminum Case + Wireless Bluetooth Keyboard for iPad 2 / 3