Fast, accurate numeric data entry combined with a convenient, mobile design.Manhattan Numeric Wired Keypad enhances any notebook computing experience, especially when inputting important numeric data. The full-size 18-key layout and membrane-style key switch technology reduce typing noise, improve response and provide low-profile keystrokes for fast and accurate data entry. A handy backspace key allows swift corrections. The asynchronous number-lock function allows users to simultaneously input letters from the computer's keyboard and input numeric data from the keypad. Its USB connection, plug-and-play installation and ultra slim, lightweight construction make it easy to pack and travel.