knobs keyboard

This is a self-made keyboard in China, appeared around 2019-04-07. It is selling at https://www.aliexpress.com/item/USB-Pr-Editing-OLED-Sccreen-Custom-Keyboard-Premiere-Final-Cut-Hot-Key-Cherry-Switch-Mechanical-Keyboard/32952668460.html

• Brand Name: HFSECURITY
• Type: Wired
• Model Number: 010505

This is great, because for many commands that has a left/right, up/down, or previous/next operations, such as page up/down, cursor word left/right, next/prev app/window/workspace, etc, the most efficient physical control of them is by a wheel or knob. It allows you to control repetition speed, and easily reverse direction.