iFixit has a nice teardown of what, one model, of an FBI GPS tracker look like. It’s really fascinating and if this is what the FBI typically uses — well it would be a cinch to spot under your car to even an untrained eye. Having said all that I am supremely disappointed with the use of D-Cell batteries, they are basically sticking a Mag-Lite under your car — that’s going to effect your fuel mileage.

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