RK ROYAL KLUDGE is a manufacturer focusing on high-performance professional gaming keyboard with 10 years of experience. Royal Kludge aims to provide gamers with high-quality craftsmanship, high-grade feel and high-performance professional gaming keyboard. We are always working hard to provide you with more suitable products. RK ROYAL KLUDGE has a professional engineering and technical staff and R and D team to provide you with high-quality design and production. We are dedicated to improving the sense of gaming experience for every player. ROYAL KLUDGE RK100 Tri-Mode Gasket Mechanical Keyboard is 96% full size with compact 100 keys, especially suitable for the mechanical keyboard starters during gaming or working. We're passionate about creating high-quality and innovative mechanical keyboards designed to enhance your computing experience. We believe that a mechanical keyboard should not only be functional and reliable, but also customizable and visually appealing. We're committed to providing our customers with the best possible experience. Whether you're a gamer looking for the ultimate gaming keyboard or a professional seeking a reliable and efficient typing experience, we have a keyboard that's right for you. Hot-swap Blue Switch: The blue switch offers “clicky” tactile feedback that certainly works for gamers or those who are in favor of the clicky feeling of typing. Hot-swap Brown Switch: It is lighter, quieter, and easier to trigger than blue switches. It is suitable for the starters of a mechanical keyboard. Hot-swap Red Switch: The linear switch offers smoother, quieter, and faster tactile feedback than brown switches, making it especially popular among gamers. And the red switch is the best switch that can be used in the office. Trigger Force: Blue＞Brown＝Red Tactile Feedback(Sound): Blue＞Brown＞Red Bluetooth mode: You can connect 3 devices at the same time, convenient and fast. Turn “G” to "B", ''OFF'' to ''ON'', it will be in Bluetooth mode("FN+Q/W/E" to connect the Bluetooth device). 2.4GHz wireless mode: Plug and play；power saving than Bluetooth；it is suitable for computers without Bluetooth.(Make sure "B" to "G", ''OFF'' to ''ON'', and then plug the 2.4G adapter, it will be in 2.4G mode.) Long press FN+''P'' until the light blinks, and then you can pair a new dongle. Type-C USB wired mode: The wired connection mode is stable and reliable, so you don’t have to worry about the game being offline when without power.(make sure ''ON'' to ''OFF''). RK ROYAL KLUDGE RK100 Software Link: bit.ly/RKRGBSOFT (The programmer is only for Window system, plz run the software in wired mode ). MULTIMIEDIA KEY & SYSTEM REQUIREMENTS Multimieda Key for Windows Windows system (Fn+A: switch to Windows system) Fn+F1: Computer Fn+F2: Browser Fn+F3: Mailbox Fn+F4: Calculator Fn+F5: Player Fn+F6: Stop Fn+F7: Last Song Fn+F8: Play / Pause Fn+F9: Next Song Fn+ F10: Mute Fn+ F11: Volume- Fn+F12: Volume+ Multimieda Key for MAC Mac system (Fn+S: switch to MAC system) Fn+F7: Last Song Fn+F8: Play/Pause Fn+F9: Next Song Fn+ F10: Mute Fn+ F11: Volume- Fn+F12: Volume+ Improve Your Typing and Gaming Experience For the lovers of both classic clicky and smooth typing, RK100 also has three switches option to select (Red, Blue, Brown). 3750 Large Battery This bluetooth mechanical keyboard has a good performance in long time using with a 3750 battery. Package Included 1 x RK100 Mechanical Keyboard1 x 2.4GHz Adaptor1 x Type-C-USB Cable1 x Keycap＆Switch Puller1 x User Manual4 x Replace Switches