I have the item in the title for sale. It’s new in box, never opened/still sealed. I bought two originally thinking I’d use the second on an appliance but I changed my mind. The other has been monitoring my whole house for some time and works great.
This is NOT the newer gen that does amps, etc.
I think these are hard to find now and go for a premium on eBay, etc.
Price: $20 plus Priority Mail within CONUS.