Many laptops eschew the numeric keypad to free up space ... dialer are counted by a Teensy microcontroller, which emulates a USB HID keyboard device and enters the relevant keystroke into the ...

This numeric keypad includes: Full-size 19mm keys. Integrated ergonomic tilt. Nano USB receiver stored inside the device. Battery indicator light. Compatibility with Windows, macOS, and Chromebook.

Well, so did [Guy Dupont], so he created a USB keypad with T9 predictive text built ... It can also change modes for old multi-press typing, numeric pad, or macro pad. We would be interested ...