[patcheudor]

Also, what kind of battery does it take and how often am I going to need to change it? Honestly, maybe it's because I have too many devices but I'm done with anything which requires a battery swap more than a once every couple years.

[Smushman]

Andrew @ Density.io answered this for me.

The sensor wires in to an electrical outlet. Andrew specified that the wire is custom length; indicating it is manually handled at install.