It sounds like you're looking for a wired USB 2.0 numeric keypad. These keypads are typically used as an auxiliary input device, providing additional number keys for tasks like data entry, accounting, or gaming. They often come with the following features:

1. USB Connectivity: Plug-and-play with USB 2.0, so they can be easily connected to any computer without requiring drivers.
2. Compact and Portable: Ideal for saving desk space or carrying around in a laptop bag.
3. Ergonomic Design: Some models come with a design aimed at reducing strain during prolonged use.
4. Additional Functionality: Some numeric keypads come with extra features like customizable keys, programmable macros, or backlighting.

Do you have any specific features or brands in mind? I could help you find some options based on that!