Best-in-class "Plug & Play" numeric keypad. Just plug this keypad into any computer and you can start working. Now with NumLock Proof technology. The Micropad 630 is the highest quality USB numeric keypad on the market. Just plug it into any PC and you can start working. It enables notebook PC users to speed through number crunching with ease. Built with high quality Cherry keyswitches (50 million life cycles). The keys are durable, yet light and easy to press, a feature lacking on lesser quality keypads.