Classification 1 features the highest volume of safety with both of those alarm and immobiliser functions put together. Class two offers only an immobiliser, which even now prevents the vehicle from beginning without the need of authorisation. The two are passively established and offer great protection in opposition to theft. https://medium.com/@trackerfit11/why-choosing-a-thatcham-tracker-strengthens-vehicle-security-6b79d8a9c256