Orginally designed for the DOJ in 1978, we have been producing the original hidden microphone system for two way radios, patented in 1982 by our founder Arthur Garabedian, more than 25 thousand have been sold and installed in vehicles around the world. Frequently copied but never duplicated, our superior audio filtering and noise removal circuitry provides for a premium hands free operation allowing drivers to keep both hands on the steering wheel and prevents their surveilances from being 'burned' by suspects spotting a microphone in the officers hands. In use with FBI US Secret Service US Marshalls DEA US Customs and Border Protection, Dept of Homeland Security. Our System offers Plug and Play on many Radio Models with custom cables and universal wire in models available for all other applications, call us for details on how we can make one for you.