A Thatcham device refers to a protection item which has been examined and certified by Thatcham Exploration. This might include alarms, immobilisers, or trackers meant to avert theft. Certification indicates the product fulfills strict expectations and is reliable by insurers. S5 trackers (previously called group 5) are Thatcham’s maximum approved https://medium.com/@trackerfit11/why-choosing-a-thatcham-tracker-strengthens-vehicle-security-6b79d8a9c256