RK 987 87 Keys Mechanical Keyboard Rainbow LED Backlit Backlight Gamers Wired Gaming Keyboard with Blue Switch for Computer PC

The RK 987 mechanical gaming keyboard is your great choice for entering the World of Mechanical Keyboards on a budget, and it has great ergonomics and a space saving design. No matter how long you type or how intense your gaming marathons are, you are always comfortable. How to use this keyboard: Key Function: Fn+Esc: Restore to factory settings; Long press Fn+Esc 3 seconds, full keyboard backlight flicker 5 times, and then restore factory defaults. Backlight switching: Fn+ ScrLK: Backlight switching; Supports multiple dynamic backlight modes, and can be cycled handover. (Specific lighting effect is subject to material object). Fn+1!/2@/3#: Supports three custom backlit Mode switching; Fn+PrtSc: Custom backlight set Specific setting method: 1.Press Fn+1!/2@/3# to select a set of backlight mode.(for example Fn+1!); 2.Press Fn+PrtSc to enter the custom backlight settings (when the indicator lights start to blink); 3.Press the keys that needs to set the backlight, repeat this step, and complete other key backlight settings; 4.Press Fn+PrtSc again to save and exit Other Setting: Fn+?: Backlight Luminance add Fn+?: Backlight Luminance reduce Fn+?: Backlight Speed add Fn+?: Backlight Speed reduce (After setting to limit, the indicator lights will continuously flicker).