Plum Purple Leather Case with Wireless Bluetooth Keyboard for Galaxy Tab 10.1" P7500 / P7510 Stylish protective PU leather case designed for Samsung Galaxy Tab display stand for easy viewing. Built-in rechargeable lithium battery lasts for approximately 45 hours per charge. Built-in wireless Bluetooth 3.0 plastic keyboard. Special Home screen key for one touch access to variety of applications. Energy saving sleep mode. The keyboard will kick into Sleep Mode when it is inactive for 15 minutes. Light weight, quiet key strokes, dust-proof and spill-proof. The user manual would tell the detailed Bluetooth pairing process