Picture: Getty – Tracker devices use satellite technologies to pinpoint the location of stolen vehicles A GPS module communicates regularly with satellites to determine its exact site, whilst GSM technologies achieves this by transmitting its positional data through mobile phone cell towers. This facts can then be triangulated to work https://medium.com/@trackerfit11/caravan-trackers-and-why-they-matter-for-theft-protection-dd44f62fcad7