... design, perfect combination for ipad4.Rechargeable battery lasts for an uninterrupted working time of up to 90 ... life: 3 years.- Key life: 5 million strokes.- Operating temperature: -10C - 55C.5.Bluetooth keyboard charges using ... standard Micro USB cable6.Bluetooth2.0 Interface, Class 2, 10 meters working distance.7. Keyboard also works with Windows, for Mac, for ...