Group one offers the best amount of safety with each alarm and immobiliser capabilities blended. Classification two delivers only an immobiliser, which even now stops the vehicle from beginning without authorisation. The two are passively set and provide fantastic security versus theft. As probably the most reliable nationwide Thatcham approved https://medium.com/@trackerfit11/why-choosing-a-thatcham-tracker-strengthens-vehicle-security-6b79d8a9c256