A tip of the boonie hat and deep genuflection to Irregular Stan who forwarded this CalGuns post, "Government GPS not hidden well enough."
The original poster said:
Me and my friend went to the mechanic today and we found this on his car. . . i am pretty confident it is a tracking device by the FBI but my friend's roommates think it is a bomb..any thoughts?
To which "jeanmarcp" replied:
It's a Guardian ST820. It's a GPS tracking unit made by the company Cobham, the product line is called Orion. The redditor who said that the battery and magnetic unit is hand made is wrong, you've got the standard kit, it is sold like that by Cobham. Sales is restricted to army and law enforcement. . . yes, FBI or Police is after you.
"jl123" on CalGuns helpfully posted this link to the GSA parts and pricing list for the unit.
From this we can conclude that the taxpayers are out a pretty penny, although by now the Fibbies have sent some embarrassed junior g-man to retrieve it. "Can we have our tracker back? Please?"
If it were me, I would have just put it in a Faraday cage inside a steel box and "disappeared" it. Let them try to figure out what happened to it. Or, maybe, better yet, I would have sent the Faraday cage incognito to Eric Holder at Main Justice. They would have handled it like a bomb. Very funny. "Well, who made it?!?" "Uh, sir, its one of ours."
Final thought: Whatever happened to the vaunted micro-bugs we have heard so much about?