Zions Security Alarms, the local ADT Authorized Dealer, is ready to help you get an affordable security system. You can get a system that is not only easy to use but also the most cutting age technology. Monitoring rates are very affordable and could save you up to 20% off your homeowners insurance. Looking to get a Home Security System in San Diego You have come to the right place. We are the local ADT Authorized Dealer in San Diego and are the least expensive way for you to get ADT. ADT has over a century of experience with over 6 million customers in North America.