C&E Bluetooth Keyboard Case for Samsung Galaxy Tab 10.1 - Black (CNE95547) 2-in-1: Wireless Bluetooth Keyboard + Folding Leather Protective Case. Built-In Lithium Rechargeable battery lasts for approximately 45 hours per charge. Special HOME screen key for one touch access to variety of applications. Waterproof and dustproof design and Ergonomic design. Lightweight, compact, easy to carry and handle.