The PRO-TEC System One is designed to monitor and protect your trailer and its contents. Designed for the do-it-yourself enthusiast, it carries a Life Time Warranty. Installing this alarm will Save on your insurance premiums and give you peace of mind. Any movement of the trailer will be detected by the built in adjustable shock sensor, or by the opening of a door. This will cause the electrical brakes of the trailer to be applied in addition to the sounding of the 128db waterproof siren provided, and the flashing of your trailers running lights The system is remotely controlled and comes complete with all hardware and universal door switches. Paging and GPS Options are also available