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Guardian Protection Alarms claims to be the "world's largest privately held security company". It serves about 200,000 customers. Guardian Protection Home Security has been in business for 59 years. The headquarters is in Warrendale, Pennsylvania.
Guardian Protection Security Systems serves Arizona, Delaware, Florida, Illinois, Indiana, New Jersey, Maryland, New York, North Carolina, Ohio, Pennsylvania, Virginia, Texas, Wisconsin and Washington, D.C.
Guardian Protection Alarms does not do pricing over the telephone.
With Guardian Protection Alarm Monitoring there seems to be an inordinate number of contract disputes with the customers. Also, even though they claim to sell you the alarm system outright, it may be that they will not provide you with the programmer code to continue operating it after your contract has expired. Praise for this company is rare.