The OTC 3395 Multimedia Interface Tester (MIT) helps diagnose vehicle communication issues on Ford, GM and Hyundai vehicles. The MIT sends a clean signal to a vehicle’s Bluetooth or auxiliary connection to confirm whether or not the vehicle is communicating properly. The device works by connecting via Bluetooth or 3.5mm auxiliary jack and providing an audible confirmation of connection and test. As vehicle infotainment systems become more complicated, the use of the MIT guarantees a clean, reliable signal to the vehicle, which allows technicians to quickly and confidently diagnose communications problems.