Product description STARS21 Aluminum CNC VIA/QMK Programmable Numpad for TKL Keyboard/Laptop/PC/Office Hot Swappable Keyboard With hot-swappable PCB supports 3-pin or 5-pin switches replacement. Wireless/Wired Keyboard The wireless numpad works with Wireless Bluetooth 5.0, 2.4GH z and Type-C wired connection, it can connect up to 3 devices at the same time. Personalized RGB Backlight This RGB illuminated keypad supports up to 16 miliion RGB colors and monochrome. QMK & VIA Programmable Keypad Full keys programmable, allows you easily create complex macros, remap keys, lighting effects and personalize your input experience Not Only A Numpad The 21 key keyboard is not only a portable financial accounting numeric keypad, but also a customized gaming keyboard for PC Gamer