1[Stepped Keycap] Ergonomic design, stepped keycap, easy to fit your hands and prevent fatigue. Spring type ergonomic design, care for your 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 for WIN2000/WINXP/VISTA/WIN7/WIN8/WIN10, for OS 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 for laptop users, banks, financial securities, business people or other keyboards without numeric parts. Small and light, it is convenient for you to take it with you. Item Type: Wired Keyboard Material: ABS Brand: For MOTOSPEED Model: K24 Colour: Black Function: Numeric Keyboard Scope of Application: Computer Backlight: RGB Lighting Effect: 13 Kinds Operating Life: 50 Million Times Cable Length: Approx. 1.5meter / 1.6yd Working Voltage: +5V5% Use Maximum Current: 300mA Interface Type: USB2.0 USB Return Rate 1MS/1KHZ Connection with Computer: Wired Operating System: For WIN2000/WINXP/VISTA/WIN7/WIN8/WIN10, for OS X Ergonomics: Support Body Color: Black Keyboard Type: High Keycap Ladder Design Number of Word Keys: 21 Keys, Using 2 Color Keycap Technology 1 x Keyboard 1 x User Manual 1 x Rubber Sleeve