Thanks Ryan for taking the time to did into these devices. At least you can solder the wires back on the EMP shield and use it at the homestead. I only have the MNS device and its been out there for nine years now and still showing blue LEDs.
Yeah I always wanted to know what was inside. Not full on snake oil at least on the EMP shield just not as stout as one may be led to think they are by marketing.