I am too interested in these, mainly as a sensor that can trigger movement and start the camera recording sooner, just find there is a delay from detection to recording on my cameras unless I set the range/sensitivity & detection type to a higher setting or alert for all movement, but then I just get a heap of false recordings/alerts that drain the batteries.
Might seem a bit of a gimmick too, but was thinking I could put one in my letterbox, then id know if I have mail
anyways, I found online here - https://www.devicedeal.com.au/eufy-security-motion-sensor-t8910c21
Says " Model # T8910C21 ** Coming in OCT 2020 "
$50 each, so a single one USD is $43 AUD, and doubt I could get them shipped to AU for $14 so might as well wait and see maybe.
Assume (hope) they work with any of the home base types.