Skque Aluminum Wireless Bluetooth Keyboard Case Stand for Asus Google Nexus 7 Tablet Built-In wireless Bluetooth 3.0 Keyboard,Anti-slide back protector shell and comfortable touch Built-in rechargeable lithium battery lasts for approx 55 hours with full charge The Bluetooth Keyboard can be used as the cover to protect your device form dust and scratch You can use this keyboard with most of the devices that have Bluetooth Nexus 7 display stand for easy viewing