thing is to think about here is how easy would it be to have ur car away and disable the tracker so the yearly fee is a waste.. with these plug in lighter devices.. does it block out the single as stated on the box.. please note i am not a car thief hate those bastards just wondering if 1 TRACKERS ARE WORTH IT 2 WE ALL JUST WANNA PLAY MIND GAMES WITH THE OFFICE STAFF lol