Welcome to the store! 1. [Stepped Keycap] Ergonomic design, stepped keycap, easy to fit your hands and prevent fatigue. Spring-type ergonomic design, takes care of your wrist. 2. [Plug and Play] Plug and play, fully programmable buttons, USB A interface. Supports ESC, Tab, Back Space, Delete, FN, etc. There are shortcuts to directly open the computer calculator. 3. [Wide Compatibility] Compatible with WIN2000/WINXP/VISTA/WIN7/WIN8/WIN10, for OS X operating systems. Ultra-durable, guaranteed 50 million keystrokes, key characters that never fade. Aluminum and ABS structure withstands tough conditions. 4. [RGB Backlight] RGB backlight and blue switches, supports 13 types of backlight modes. By pressing the FN key and another key simultaneously, you can change the backlight and brightness. The professional mechanical blue switch with tactile collision and sound click provides fast and accurate keystrokes. 5. [21 Keys] Expand your desktop, the 21-key mechanical numeric keyboard is suitable for laptop users, banks, financial securities, businessmen, or other keyboards without numeric parts. Small and lightweight, it's convenient for you to carry. Item Type: Wired Keyboard Material: ABS Model: K24 Color: Black Function: Numeric Keyboard Scope of Application: Computer Backlight: RGB Light Effect: 13 types Operating Life: 50 million times Cable Length: Approx. 1.5 meters / 1.6yd Working Voltage: +5V±5% Maximum Current Consumption: 300mA Interface Type: USB2.0 USB return rate 1MS/1KHZ Connection to Computer: Wired Operating System: For WIN2000/WINXP/VISTA/WIN7/WIN8/WIN10, for OS X Ergonomics: Support Body Color: Black Keyboard Type: High keyboard design Number of Keycaps: 21 keys, with 2-color keycap technology 1 x Keyboard 1 x User Manual 1 x Rubber Cover Your satisfaction is our top priority. We will provide you with the best service. If you encounter any problems after receiving the product, such as damage, incorrect quantity, etc., please contact us immediately and we will provide you with the best solution!