?Friendly guarantee?Package contents: Mechanical Gaming Keyboard,charging cable,user manual,At the same time, we will provide a 12-month warranty period to provide you with good after-sales service. ?Wide compatibility?Rii RK909 Mechanical Gaming Keyboard Plug and play,no need to download the program to drive,USB connection,convenient and efficient,fully compatible with IBM PC Win XP Win7/Win8/Win10 system USB. ?Detachable Magnet Frame?Mechanical keyboard is equipped with a detachable magnet frame, which is convenient for customers to adjust the shape of the keyboard, and can be installed or removed at any time; Dustproof and easy to clear. ?LED Rainbow Backlit?Gaming keyboard is backlit in a variety of colors.Press Fn+INS to switch the backlight mode,"Fn+increase/Reduce Backlight Brightness,bring more interesting colors to your life, work and study. ?Triple Mode Connection?Mechanical keyboard has three connectivity modes: Bluetooth 5.0, 2.4Ghz and USB-C,multiple devices can be connected simultaneously;96% compact layout saves space; Full button simultaneous use without conflict, anti-ghosting. Commercial axis keyboard, strong resilience, typing crisp and comfortable, suitable for learning, playing games or work.