Metra 70-7301 is a wiring harness designed to connect an aftermarket radio to a Hyundai/Kia vehicle, enabling the use of features like the vehicle's speed pulse and amplifier turn-on. It features a blue/white wire that serves as a vehicle speed pulse signal in 2007-2008 Hyundai Tiburon models without amplified systems, while in other applications it functions as an amplifier turn-on lead. With this harness, you can integrate your aftermarket radio seamlessly into your vehicle's audio system.