75% RGB Mechanical Gasket Mount Keyboard: 75% layout with 81 keys, which makes the desktop more concise; the gasket structure of 75% keyboard provides a cushioned, consistent typing feel and pleasing acoustic feedback OLED Smart Display & Knob: RK M75 comes with a built-in OLED screen and rotary knob; OLED screen design can display battery level, WIN/MAC, wired/2.4G/Bluetooth mode. And you can adjust volume, switch mode and device with the rotary knob Triple Mode & Multi-device Connectivity: This hot swappable keyboard supports USB-C wired, 2.4G wireless, and Bluetooth 5.1 modes; Connect up to 3 devices via Bluetooth and switch seamlessly using the knob, compatible with Win and Mac Hot-swappable Light Switches: The RK M75 mechanical keyboard features quiet linear Light Switches (3.40mm travel, 40gf force) for a smooth, silent typing experience ideal for office, gaming, and late-night use. Double-shot PBT Keycaps & South-facing RGB: The gaming keyboard features durable double-shot PBT keycaps for a comfortable, oil-resistant feel; South-facing RGB lighting ensures even backlighting and avoids interference when swapping switches 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. -RK M75 wireless keyboard, which is 75% layout with 81 keys, which saves 25% of the wireless keyboard space and makes the desktop more concise. -This wireless keyboard has an OLED screen and rotary knob. And it dispays battery level, WIN/MAC, wired/2.4G/Bluetooth mode, volume level. You could rorate the knob for choosing switch machine and adjusting the volume. -RK M75 wireless keyboard is coming with triple mode connection, which supports USB-C wired mode, 2.4G wireless mode and Bluetooth 5.1 mode. Up to 3 devices can be connected via Bluetooth at the same time, and can be easily switched by the knob. -High-quality PCB of this wireless keyboard supports 3/5-pin hot-swappable, so you can make your own unique wireless keyboard without soldering. -RGB Backlight: this wireless keyboard supports 18 RGB backlight modes, 8 monochrome backlight modes and 1 full-color backlight. You could C=customizable RGB lighting, which provides you with cool and attractive lighting. RK Royal Kludge will always bring you different ideas, from constant innovation and improvement, whether you are a keyboard novice or a gaming enthusiast, you can find the most suitable keyboard for you. Size: 327.6(L)×138.5(W)×42(H)±2 Layout: 81 keys Backlight: Single light/RGB Switch: Viridian Switch Package Included 1 x RK M75 mechanical keyboard 1 x 2.4GHz daptor 1 x type-C-USB cable 1 x keycap＆switch puller 1 x user manual 4 x replace switches