Description: 21 Keys : key mini customized mechanical keyboard, USB cable supply, plug . RGB: RGB colorful background lighting effects, , crystal translucent , , small but not simple. Application: able , suitable for gamers, , cashier desk, bank, , office, etc. able : 15 degree tilt, ergonomically ed keyboard provides and helps reduce strain. Mechanical shaft, smooth , time and energy, improving your work efficiency. Anti Slip: There are non slip back of keyboard, which it from sliding around . Specification: Material: ABS Plastic Model Number: K10 Type: Mini Wired Mechanical Keypad Supply: USB2.0 Interface: Type C Operating system: WIN2000/WINXP/VISTA/WIN7/WIN8/WIN10 Keyboard type: high keycap ladder keys: 21 keys, pudding keycap Support Flash programming online , and custom programming The FN key combination functions FN+, adjust 14 kinds of backlight FN+* switch random 7 or 7 (note some modes do not support) FN+8/2 5-level speed adjustment FN+ +/- of brightness adjustment FN+ESC 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 adjustment Size Chart: 133.4x87.6x41.6mm/5.25x3.45x1.64inch Package Includes: Wired Numeric Keypad (Black+) Note: 1.Please 1~3 cm error due to manual measurement, thanks. 2.Due to between different monitors, the picture may not reflect the actual the . Please understand, thanks!