Connect in line on the speaker ISO cables and the interface converts the audio from high to low level to enable the BOSE amplifier to work.
Fits the following Alfa Romeo vehicles:
147, 156, 159, Brera and GT
Comes with a mini-ISO pre-pinned for the BOSE amplifier turn on for cars without steering wheel controls. If using with a car with steering wheel controls, then the supplied red connector should be disregarded and the interface is connected to the connector attached to the steering wheel control interface.
Fitting instructions are included. The amplifier turn on wire is already connected to the the vehicle connectors, just a connection to the accessory or amplifier turn on from new stereo is required - usually a blue or blue and white wire from the wiring harness of the new radio.