1、[Stepped Keycap] Ergonomic design, stepped keycap, easy to fit your hands and prevent fatigue. Spring type ergonomic design, care compatible withyour wrist. 2、[Plug and Play] Plug and play, fully programmable buttons, USB A interface. Support ESC, Tab, Back Space, Delete, FN, etc. There are shortcut keys to open the computer calculator directly. 3、[Wide Compatibility] Compatible with compatible withWIN2000/WINXP/VISTA/WIN7/WIN8/WIN10, compatible withOS X operating system, Ultra durable, guaranteed 50 million keystrokes, key characters that never fade. The aluminum and ABS structure can withstand harsh conditions. 4、[RGB Backlight] RGB backlight and blue switch, support 13 kinds of backlight modes. By pressing the FN key and another key at the same time, 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] Extend your desktop, 21 keys mechanical numeric keypad is suitable compatible withlaptop users, banks, financial securities, business people or other keyboards without numeric parts. Small and light, it is convenient compatible withyou to take it with you. 1 x Keyboard1 x User Manual1 x Rubber Sleeve Item Type: Wired KeyboardMaterial: ABS: compatible withMOTOSPEEDModel: K24Colour: BlackFunction: Numeric KeyboardScope of Application: ComputerBacklight: RGBLighting Effect: 13 KindsOperating Life: 50 Million TimesCable Length: Approx. 1.5meter / 1.6ydWorking Voltage: +5V±5%Use Maximum Current: 300mAInterface Type: USB 2.0 USB Return Rate 1MS/1KHZConnection with Computer: WiredOperating System: compatible withWIN2000/WINXP/VISTA/WIN7/WIN8/WIN10, compatible withOS XErgonomics: SupportBody Color: BlackKeyboard Type: High Keycap Ladder DesignNumber of Word Keys: 21 Keys, Using 2 Color Keycap Technology