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Welcome to a site where you receive free tips on securing your building against burglary by simple, inexpensive, do it yourself means or learn the basics of the alarm industry so you're prepared to talk with an alarm representative while evaluating an electronic alarm system. You will also find descriptions of several proprietary devices, which have been designed by CHM and are built in our own facilities. If you want additional information, you can contact us at 414-427-0700 or E-mail at chm@chmsecurity.com.