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Discreet Devices the worldwide leader of Professional Private Investigator Equipment.  We sell professional, high-quality surveillance tools for industry professionals, including Private Investigators, Law Enforcement Officials, and the general public.  Get everything you need to conduct your own investigation with our easy-to-use devices.



Total Security Group, Inc., and Discreet Devices was founded and run by a team of licensed Private Investigators with over 30+ years of professional experience.  All of the products sold by us are hand-selected by our seasoned Private Investigator experts, who have firsthand knowledge and experience with using surveillance equipment.

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Total Security Group, Inc. 


1516 N. Elmhurst Rd., Ste. 137

Mount Prospect, IL 60056

(773) 775-7600 Office

(773) 775-7300 Fax

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