Ting

Received one by signing up on State Farm for free. Not sure if I want to actually use it, especially when linked to home insurance.

You can buy one on eBay, because they have a subscription, so I suppose many people don't want them any more.

Hardware

Plastic shell with a button on the lower-left edge and LED indicator in the center of the lower black portion. Plugs into a USA 120V 3-prong outlet.

Back of device, with label

The back half overlaps the front half. There are three notches with clips on each side, and one on top, one on bottom. Prying these popped it apart.

Bottom of device, notch in inner (top) half

Note the antenna on front, don't yank it apart!

There is one main PCB, soldered to the 120V blades

ISM4343 module

Metal can labeled ISM4343-WBM

https://www.digikey.com/en/products/detail/inventek-systems/ISM4343-WBM-L151/9673373

https://www.inventeksys.com/wp-content/uploads/ISM4343-WBM-L151%20Functional_Specification.pdf

LPC MCU and level shifter in focus

NXP MCU LPC4370FET100

https://www.nxp.com/products/LPC4370FET100

https://www.nxp.com/docs/en/data-sheet/LPC4370.pdf

TI LVC126A may be an SN74LVC126A 1.65V to 3.6V buffer

https://www.ti.com/lit/ds/symlink/sn74lvc126a.pdf?ts=1744658910401