1. Built-in rechargeable lithium battery with 80 hours uninterrupted use or 25 days standby. * 2. 360 degree rotation and removable and detachable design offers more freedom and fun using iPad mini. * 3. Bluetooth 3.0 keyboard delivers super fast and stable wireless operation with 10M range. * 4.High quality PU leather case provides the perfect protection for your iPad Mini. * 5.Built-in rechargeable lithium battery with 80 hours uninterrupted use or 25 days standby.