Azio Ultra Slim Mini Bluetooth 3.0 Wireless Keyboard for iPad Mini / iPad Air / iPad / Galaxy Tab and other Tablets-Black (KB313B) COMPATIBILITY - Designed for Mac & iPad, works with most other Bluetooth HID enabled devices. COMPACT DESIGN - The thickest part of the keyboard measures only 10mm (0.4 inches). WIRELESS FREEDOM - Enjoy wireless connectivity of up to 33 ft. Interface: Bluetooth 3.0 Battery Life: Up to: 40 hrs. continuous use / 4mo. Standby