Very cool, even though it's limited to Makita LXR at this point.

I think the home page is LLM-aided, the design looks very familiar and wording like

[...] no software to install, nothing to set up. Plug in an Arduino, flash the firmware [...]

gives me pause. I am an actual embedded software engineer, and I would not classify finding, wiring (with resistors!) and flashing a microcontroller board as "nothing to set up".