Digital Treasures Props Folding Bluetooth Keyboard (09309-PG) 200 mAh rechargeable lithium-ion battery provides reliable power Up to 20 hours continuous working time with a single charge Built-in detachable tablet stand for optimum viewing angle Offers typing comfort of a full size keyboard Can be used with Tablets, Smartphones, Notebooks, or Ultra books that run on Android, Windows, or iOS operating systems Bluetooth technology for wire free operation