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 ... .0V Standby time:150 hoursOptional color: sliver black / silver whiteBritish keyboard:10 inch,82 keys,245*95mmBattery: standby time-60days,Uninterrupted Working ...