Actually, those puppies do have power monitoring. (I don't use it, so I can't say how sensitive it is--the Hubitat driver doesn't let you configure it--but it is there. I actually wish fewer devices had this feature or more let you disable it [and that the setting to do so worked...] because I try to eliminate unnecessary traffic on my networks, but that's another story.) I'm not sure about the older/Centralite versions, as I got rid of mine a while back in a quest to make a Xiaomi-friendly network (then the Iris v2 sensors all went on fantastic sales and I stopped caring but already got rid of it...yet another story), but perhaps you're thinking of one of those.
They're also fantastic Zigbee repeaters! One of mine reports routing for 8 end devices, and both of mine seem to be preferred by other devices over my other repeaters like my Ikea Trådfri outlets (not bad but no surprise there) and even my Xbee (non-Pro, PCB/built-in antenna, and not centrally located, in its defense). They're probably my favorite Zigbee repeater.