iClever Universal Wireless Keyboard with LED Backlight 7-Colors, Built-in Rechargeable Battery, Quiet Typing Portable Slim Bluetooth Keyboard for Windows, iOS, Mac, Other Tablets and Smartphones 7 Unique Backlight Color: 7 Elegant LED backlight with 2 brightness level and auto sleep feature to maximize power usage. Broad Compatibility: Use with all four major operating systems supporting Bluetooth (iOS, Android, Mac OS and Windows), including iPad 1, 2, Air, Air 2 / iPad mini 4, 3, 2, 1, Retina / iPhone / Android Tablets like Samsung Galaxy Tab, Google Nexus / Windows, etc 120-Day Battery Life: Rechargeable lithium battery with an industry-high capacity lasts for 120 days between charges (based on 2 hours non-stop use per day and backlit off) Ultra Thin and Light: Compact size (7.17 x 9.76 x 0.63in) and light weight (0.38lb) allows easily carried and packed backpack, messager bag or case Package contents: iClever Bluetooth Keyboard with LED Backlit, USB charging cable, welcome guide, our 24-month warranty and friendly customer service