Description: 21 Keys Numpad: The 21 key mini customized mechanical keyboard, USB cable power supply, plug and play. RGB: RGB colorful background lighting effects, cool and fashion, crystal translucent texture, , small but not simple. Application: Comfortable design, suitable for gamers, PS designers, cashier desk, bank, stock exchange, office, etc. Comfortable to Use: 15 degree tilt, ergonomically designed keyboard provides comfort and helps reduce strain. Mechanical shaft, smooth to touch, save time and energy, improving your work efficiency. Anti Slip: There are non slip mats on the back of the number keyboard, which prevents it from sliding around your desk. Specification: Material: ABS Plastic Model Number: K10 Type: Mini Wired Mechanical Keypad Power Supply: USB2.0 Interface: Type C Operating system: WIN2000/WINXP/VISTA/WIN7/WIN8/WIN10 Keyboard type: high keycap ladder design keys: 21 keys, pudding keycap Support Flash programming online update, and custom programming The FN key combination functions FN+←, adjust 14 kinds of backlight FN+* switch random 7 colors or 7 monochrome colors (note that some modes do not support) FN+8/2 5-level speed adjustment FN+ +/- 5 levels of brightness adjustment FN+ESC Restore factory settings FN+LED front light OFF/ NO backlight function FN+NUM calculator FN+Tab Streamer, static, breathing, neon, off, five modes switch FN+/ 8 independent color adjustment Size Chart: 133.4x87.6x41.6mm/5.25x3.45x1.64inch Package Includes: 2 Piece Wired Numeric Keypad (Black+Blue) Note: 1.Please allow 1~3 cm error due to manual measurement, thanks. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Please understand, thanks!