That is THREE MODES: Believe it or not, this is the first generation of RGB three-mode wireless keyboards on the market. Wireless mode with stable bluetooth 5.0, hassle-free 2.4Ghz dongle plus USB-C wired mode set no limits about your keyboard connection. 84 Keys, Redefine TKL: The innovative 75% unique layout differs from traditional TKL keyboards, which cuts more clumsy space off while supporting the same functionality as practical arrow, multimedia and control keys. Hot-swappable Tactile Blue: 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. Blue switch is a little bit clicky but it’s authentic and original, which is the most distinctive mechanical switch. It will remind you with the first feeling about mechanical keyboard, incomparable click feedback and refreshing tactile feel will make you typing with BGM. Hub Design & 3750mAh Big Mac - This 3750 mAh keyboard is armed with 2 built-in USB pass-through ports and 1 Type-C Port, allowing to back up more facilities. Week-durable to 200 hours with nonstop using under backlight off status, fully charged requires only 6-7 hours. DIY Software Supports: DIY keybinding shortcuts, adjust brilliant backlight modes, reassign various key functions, these are the powerful functions of the RK84 professional driver. Keyboard Layout: US Layout