Napoer Portable Wireless Ultra Slim Bluetooth 3.0 Keyboard with 7 Colors Backlit for IOS, Android, Windows Tablets Made of Aircraft-grade aluminum for superior rigidity, anodized matte process creates excellent sense of touch. Built-in 450mAh rechargeable Li-polymer battery provides 100 hours of effective usage time without backlit, 10 hours of effective usage time with backlit on. With 7 unique backlight color options, Elegant LED backlight with 2 brightness level and auto sleep feature to maximize power usage. Light Weight and ultra slim. Compact size (9x4.4x0.16in) and light weight 187g(0.41lb), easy to take away, perfect for travel and outdoor using. Bluetooth 3.0 technology enables a cable-free and clutter-free connection, offer you comfortable, quiet and smooth typing experience. Supports IOS/Android/Windows operating system. Works with all Bluetooth supported devices, even laptops and computers,including iPad 1, 2, Air, Air 2 / iPad mini 3, 2, 1, Retina / iPhone / Android Tablets like Samsung Galaxy Tab, Google Nexus / Windows, etc.