CUSTOM HOT SWAPPABLE KEYBOARD: The YZ21 features on the hot-swap capability. Hotswappable Gateron switch of YZ21 can be easily replaced by other 3 pins or 5 pins hotswap switches without soldering. You can easily customize the keyboard and change out the switches to have a completely different tactile experience. | AESTHETIC AND FUNCTIONAL: The YZ21 number pad for laptop or desktop will enhance the look of your workspace while multiple shortcut keys and macro function allow you to work more efficiently. | MACRO & CUSTOMIZED RGB EFFECTS: The number pad has fully programmable RGB LEDs, 16.8 Million Color combinations. With the custom software, you can customize the RGB effects massive lighting effects and macro setting. | 85% PBT DYE SUB KEYCAP: Unique to the YZ21 design is the combination of high quality PBT keycaps and aesthetic design. As to ensure the impressive color scheme and enjoyable typing experience, the YZ21 applies high quality PBT dye-sublimation technology. The keycap is more durable, anti-fade, oil-resistant, and stays true to color longer. | SIMPLE SETUP AND WIDE COMPATIBILITY: Simply pair your number keypad via included USB cable and start working efficiently. No fatigue after long term use and 100% full anti-ghosting without conflict. Compatible with Mac, PC,Windows, iOS, Android.