hi mate i,ve had an evo a couple of years ago nnow with the tracker on her, it was tracker,s own one called retrieve and monitor, basically it,s an always active one as i found out one day i got the dreadded call that every car owner never wants to get, but thankfully, because the car was parked and alarmed, some twat parked behind me and rolled gently into my bumper causing my car to move slightly . the tracker company called to see why my car alarm was armed and my car moving!! it could only have moved less than two inches!! so i,d say to deff get one.