Bluetooth Keyboard Folio. Opens like a book; types like a keyboard. Protective folio carrying-case with built-in keyboard Tactile-feedback keys that won"t cramp your typing Easy one-time Bluetooth pairing setup Internal rechargeable lithium-ion battery with included USB charging cable. Compatible with iPad 2 and iPad 3. Features: Bluetooth 2.0 / 3.0 Lithium-ion Battery Capacity - 200 mAh Uninterrupted Working Time - 30 hours Standby Time - 45 days Charging time - 2-2.5 hours