Upgrade your vehicle's stereo system with this Metra amplifier retention interface for 2016-and-up Honda Civic models. Featuring a factory-compatible circuit, the interface converts the new installed stereo's signal to a format that works with the factory amp. This Metra amplifier retention interface is Micro-B USB updatable, facilitating hassle-free firmware upgrades. | Metra | | Amplifier Interface for Select Honda Vehicles | Black | Best Buy