The Manhattan Numeric Wired Keypad makes any notebook computing experience better, especially when you're inputting important numeric data. The full-size 18-key layout and membrane-style key switch technology reduces typing noise, improves response and provides low-profile keystrokes for fast and accurate data entry. A handy backspace key lets you make swift corrections. The asynchronous number-lock function makes it easy to simultaneously input letters from the computer's keyboard and numbers from the keypad. Its USB connection, plug-and-play installation and ultra-slim, lightweight construction make it easy to pack and travel.