Picture: Getty – Tracker devices use satellite technology to pinpoint the location of stolen cars A GPS module communicates continually with satellites to ascertain its precise site, although GSM technology achieves this by transmitting its positional knowledge by way of cell phone mobile towers. This info can then be triangulated https://medium.com/@trackerfit11/caravan-trackers-and-why-they-matter-for-theft-protection-dd44f62fcad7