One trailer security system is designed to monitor and protect the trailer and it's contents. Any movement of the trailer, or the opening of a door will trigger the alarm. This will cause the siren to blast, running lights flash, and the electrical brakes of the trailer to be applied making movement impossible. Our state of the art Trailer Security Systems, Enclosed Trailer Alarms and Trailer Alarm Systems feature a control unit, transmitters, and a remote control. If you are looking for a trailer alarm system or trailer security system for your race car, toy hauler, horse trailer, or travel trailer with great features and a quick and easy installation, then you have come to the right place.