V7 Space Saving Ergonomic Spill Resistant 19 Key USB Numeric Keypad for Windows Desktop PC Notebook Laptop (KP0N1-7N0P) - Black Space saving ergonomic spill resistant 19 key USB numeric keypad with back space and "00" keys for improved productivity USB wired connection with storable USB connector hides cable to safely transport and reduce cable clutter. Simple plug and play installation. Low profile, quiet soft-touch gently-curved key design for all-day comfort for demanding keyboard interaction. Works with PC and desktop computers that have Windows 2000, XP, Vista, or Windows 7 operating systems.