Boost your productivity with our 21-Key Mechanical Numeric Keypad, designed for seamless data entry! Featuring a Mechanical Linear Action Switch structure, it offers an excellent tactile feel and quiet operation. This plug-and-play keypad connects via USB, requiring no drivers, and is compatible with multiple systems, making it ideal for banking, financial accounting, supermarket cashiers, industrial PCs, and server input. Laser-engraved characters ensure durability and prevent fading, while the keys boast a lifespan of over 50 million presses. Four large non-slip feet on the underside prevent movement during use. Enjoy splash-proof design and convenient keys including Back Space, Esc, Ctrl, Alt, NumLock, Enter, +-*/, and Del for quick corrections and versatile functionality. Compact and convenient, it's perfect for laptop users and various professional applications. Cable length: Approx. 1.4m. Supports: DOS, Windows 95/98/NT/ME/2000/2003/XP/VISTA/7/8/10, Linux, OS X, etc.