Bornd B33 Bluetooth 3.0 Wireless Keyboard for iPad Mini / iPad / Nexus 7 / Galaxy Tab and other Tablets/Desktop (Sliver) Operation Range: 39 feet Operating Voltage: 3 V Operating Current: 7 mA Compatibility: Windows 98/ 2000/ XP/ ME/ Vista/ 7/ 8/ Android/ IOS/ Mac OS 2x AA Alkaline Batteries Included