I got from Aliexpress (for few dolars/pcs) some small ZigBee human montion/presence sensors (model: IH012-RT01). Those have Diameter 33mm x 16mm (body) - 28mm height with fresnel lens. Those sensors are powered from CR2450.

Might fit for wifi version too, but since I don't have any - I don't know.

If you want to cover that blue LED then check another set of photos (I used a small piece of black electrical tape) you'll see how to remove that internal plastic - there is no latches, it's just that tight fitted. Bend back contact for battery+ , and insert there under the plastic a small flat screwdriver, then pulling it and pressing the plastic to the screwdriver pull this plastic insert, DON'T WIGGLE screwdriver around - you might damage electronic circuit inside!!!

Creality

Ender 3

No

Yes

0,2

20-40

Supports: everywhere, infill 20-40%,
Best is PET-G because it's a bit more flexible than PLA, but PLA should work too.