7 Colors Backlit Keyboard -- This wireless keyboard has 7 stylish backlight colors and 3 low-mid-high brightness levels, not only can experience different visual enjoyments, but also make it easy to use in dark places. One keyboard for 4 Devices -- This multi-device Bluetooth keyboard allow connect up to 4 devices simultaneously, saving money and space. Specially designed for Windows/Mac OS/iOS/Android four operating systems, meeting your different needs. Rechargeable Bluetooth Keyboard -- Built-in rechargeable battery, with auto sleep mode function, this keyboard can work for up to 667 hours without backlit. Just 5 hours of charging, no need to replace battery, which is convenient and power-saving. Ultra Slim Ergonomic Keyboard -- Ultra Slim design (the thinnest part is just 0.3 inch) and classic keyboard color greatly enhance texture and easy to carry. Unique scissor switch keys and ergonomic stand help reduce typing noise, keep comfortable feeling. Full Size Universal Keyboard -- A full size keyboard with convenient numeric keypad and multi-function keys to improve work efficiency. This keyboard enjoys 12-month free warranty, if you receive defective product or have any issue, please contact us.