Need an ignition interlock device near Chattanooga? Intoxalock is available at THE RADIO CLINIC, a certified Intoxalock ignition interlock installer. We can install your breathalyzer in cars, trucks, vans and other vehicles.The Radio Clinic was established in 1985 as a leading mobile entertainment sales and service center in the Chattanooga area. Along with offering the best products and installation, we offer fully customized audio, video and security systems. We have been an authorized ignition interlock installer for Intoxalock since 2013.