This range of aftermarket immobilisers includes two Thatcham Approved 12 volt systems and one 24 volt system. The 921K is operated by a touch key (or contact key), the 921T is operated by a transponder (or RFID) tag as is the 261T-24v. Each immobiliser system is supplied with two controls as standard with the option of additional controls.We supply aftermarket vehicle immobilisers to the private and commerical automotive industry. Our products are compatible with the majority of automobile manufacturers. Call us today for help in finding the right system for your make and model of vehicle.