Linear Switch: This wired numeric keypad uses a mechanical linear switch, ensuring a comfortable feel and quiet operation. Plug and Play: This mechanical numeric keypad uses a USB port and supports plug and play, compatible with most systems. Multifunctional: This USB numeric keypad is equipped with Num Lock key, Delete key, Enter key, +-*/- keys, and Del key. High Security: This 18-key numeric keypad has a waterproof design and 4 non-slip feet on the bottom, ensuring high security and stability. Wide Application: This numeric keypad is suitable for laptop users, banks, financial security, and business professionals. Product Type: Mechanical Numeric Keypad Material: ABS Keys: 18 Keys Connection: USB Cable Length: 1.4 meters Switch Type: Mechanical Linear Switch Switch Lifespan: Over 50 million clicks Product Size: Approx. 140 x 102 x 25 mm / 5.51 x 4.02 x 0.98 in Features: Waterproof, Mechanical Linear Switch, with Num Lock key, with Delete key, with Enter key, with +-*/- keys, with Del key Applications: Business, Industrial Control, Video and Education, Security, Road and Bridge, Securities and Other Scenarios Compatibility: Suitable for DOS, Windows 95, 98, NT, ME, 2000, 2003, XP, Vista, 7, 8, 10, Linux, OS, Tablet, etc. 1 x Mechanical Numeric Keypad