Review on 🌡️ Honeywell 2 Pack RedLINK 3.0 Indoor Sensor C7189R2002-2: Enhance Your Indoor Climate Control with Smart, Reliable Monitoring by Mike Walters

I bought these for installation in additional rooms to work with T10 and they work very well. The furthest one is about 40 feet from the T10 and works fine. I haven't actually used the "Activity" setting on the T10 when the sensor uses its motion detector to tell the T10 which rooms are occupied, so I can't comment on that. I plan to use this feature soon, so I'll update this post.