Data interfaces with SWC (steering wheel control) allow you install an aftermarket stereo and yet retain factory features. Provides NAV outputs (parking brake, reverse, speed sense). Retains audio controls on the steering wheel when installing an aftermarket radio. Retains electronic transmission of motor vehicle information and data. Designed for amplified and non-amplifed models. Retains balance and fade on non-amplified models. Micro B USB updatable.