Fangrui Product Details [stable Connection]usb 2.0 Wired Technology, Plug And Play, No Device Drivers, Signal Mission Stability, No Delay Number Pad, Tpe - Protecting Cord. [full-size 18 Keys Keypad]professional 18 Full-size And Concave 18 Keys Design, Applicated In Sock, Notebook Computer, Banking, School, Company Etc. Numeric Keypads Keycaps Life Of More Than 10 Million Times. [ergonomic Design]abs Material, Small, Slim Design, Numeric Keypad Is Easy To Take With You, 18 Keys Usb Number Pad Are Easy And Silent To Press, Ergonomic Tilt And Anti-slip Pads On Back Provides Comfort. [compatible]numeric Keypad Compatible With Android Tablet Pc, Linux, Desktop, Chromebook Windows Xp / Vista / 7 / 8 / 10 Series. [power Saving ]no Battery Required, It Enters Into Hibernation/sleep Mode Automatically, Energy Saving, Extended Service Life, Dont Have To Worry About Your Numeric Keypad For Laptop Will Be No Power. Colour:black / White Material:abs Size:134mm X 85mm X 22mm Package Contents: 1 X Wired Keyboard Only The Above Package Con