Double-shot PBT Keycaps & South-facing RGB Backlight: RK M75 keyboard comes with double-shot PBT keycaps, which provides more comfortable fingertip feel with oil resistance for long-term use.The south-facing RGB is designed to better illuminate the keyboard backlight from the typist’s angle and free from interference while changing the switches. Hot-Swappable Pale Green Switch: This mechanical keyboard is equipped with the pale green switch. The total travel of pale green switch is 3.70mm and operating force is 40gf, so the keypress of this switch offers a light and smooth feel, which will be a brand new input experience. Triple Mode + Multi-device Connection: This hot swappable keyboard supports 3 connection modes, including 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. Compatible with Win/Mac dual system, unlimited use. OLED Smart Display and Knob: Royal Kludge M75 keyboard has built-in brand new OLED display 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 switch the device with the rotary knob. 75% RGB Mechanical Gasket Mount Keyboard: 75% layout with 81 keys, which makes the desktop more concise. This gaming keyboard features a gasket structure which uses gasket material between the plate and keyboard housing on both top and bottom sides. It gives the board a slightly cushioned feel, which provides a consistent, softer, and more comfortable typing feel and pleg acoustic feedback.