Thatcham Category S7 is one of the new classifications for vehicle Trackers replacing the Thatcham Category 6 and 7. These Trackers offer a range of features from a simple track and locate, to live tracking. Thatcham Category S7 is a GPS, GPRS and GSM stolen vehicle recovery system which has a movement sensor for its trigger along with a battery backup in case the vehicle battery gets disconnected enabling you to still track the vehicle at all times.