[Solvex: EcoBee Smart Sensor]
About 4cm, powered by CR2477 batteries.
Edit. Found another one, and this one had the top off.
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The logo is for Ecobee, they do smart home stuff like thermostats and doorbells. That specifically looks like one of their smart sensors
Yep! Specifically, this is likely a temperature and occupancy sensor meant for use in conjunction with their smart thermostats. Something pretty similar to this: https://a.co/d/0g0CuprM
Looks like that’s it! Thank you!!
Looks like it! Thank you!!
https://www.ecobee.com/en-us/sensors/smart-temperature-occupancy-sensor/
100% an Ecobee remote sensor. Connects to a thermostat, totally benign.
I’d say the central component in the opened pic is a https://en.wikipedia.org/wiki/Pyroelectricity (PIR) sensor. Often used for detecting motion, but some models at least can do more.
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