NTK Pemium Wireless Bluetooth Keyboard Folding Leather Case For Samsung Galaxy Tab 10.1 New Built In Wireless Bluetooth 2.0 Plastic/Silicone Soft Touch Keyboard Built-in Lithium Lion Battery Capacity: 500 mAh Standby time: 60 Days/ Uninterrupted Working time: 40 Hours/ Fully Charged in 3~3.5 Hours Premium Faux Leather Finish/ Customized Fit for Samsung Galaxy Tab 10.1 Ultra Low Profile=Easy to Carry Around Foldable Stand for Xoom/Easily Connect to Bluetooth