1、[21 Key] Expand your desktop, 21 key 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. 2、[Stepped Keycap] Ergonomic design, stepped keycap, easy to fit your hands and prevent fatigue. Spring type ergonomic design, care for your wrist. Suitable for PCs and desktop computers with for Windows 2000 / XP / Vista / 7/8 / 10, for Android, for Linux, for IOS. 3、[Fadeless] Ultra durable, guarantees 50 million keystrokes, and the key characters will never fade. The ABS structure can stand the test of harsh conditions. 4、[Mechanical] Mechanical blue switch, professional mechanical blue switch, with tactile and click sound, providing fast and accurate keystrokes. 5、[No Driver Required] Plug and play, no driver required, USB Type C interface. Support NumLock, ESC, Tab, Delete, etc. Item Type: Wired Keyboard Material: ABS Brand: For MOTOSPEED Model: K23 Colour: Black Function: Numeric Keyboard Scope of Application: Computer, Etc. Operating Life: 50 Million Times Data Line Length: Approx. 1.5meter / 1.6yd Use Maximum Current: 100mA Interface Type: USB Connection with Computer: Wired Operating System: For WIN2000/XP/VISTA/WIN7/WIN8/WIN10, Etc. Ergonomics: Support 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 Power Cord 1 x Rubber Sleeve