Single Blue, Abundant Dynamic: Even if RK68 has no multicolored RGB but only blue LED backlit, the 20 dynamic backlit modes will hype your gaming set a unique style. Use FN + to choose your ideal mode, adjust the brightness and glowing speed freely. Get some lights on to take your blues away and make your day. DIY Software Supports & High-capacity Battery: DIY keybinding shortcuts, adjust brilliant backlight modes, reassign various key functions, these are the powerful functions of the RK68 professional driver. What’s more, 1450mAh battery allows you to use continuously about 13 hours with lightest backlight. 3-4 hours fast recharging time will bring it online asap, it will never lay down even if you are tired. Hot-swappable Quiet Red: Hot-swap PCB allows you to replace 3 pins/5 pins switches freely without soldering issue. Enjoy the fun of making your own unique keyboard. Red switch features a quiet and linear typing experience. The soft, top-to-bottom feedback offers easier and smoother use than other tactile switches. Perfect for people who work in an open office and stay up gamers. 65% Layout, Compact Practical: What makes the 68 keys different from the 61/71 keys, it's RK68 boasts both practical and compact features, while retaining minimalist layout and it also geared with arrow keys and frequently used control keys. Dual Modes, Reliable Free: Equipped with an upgraded chip, every keystroke is instantly registered and stable wireless connection offers you real freely typing experience. Easily 3 different devices switchable with FN + Q/W/E in wireless mode will hype you up and maximize your productivity.