Use this adapter to make your installation of an amplifier to the factory system faster with a cleaner install. Use this plug and play adapter so you don't have to cut or splice into the factory wiring. Provides rca output and a power wire for the remote amplifier turn on connection. Adjustable gain output. Connection is done at back of radio. For vehicles that didn't come with a factory external amp. Compatible vehicles: No external factory amplifier vehicles only: Made for Honda: Made for Honda: 2022 2023 2024 Civic LX, LX-P, Sport