AERPRO The primary harness is the harness that plugs into your cars main entertainment system connector and converts it into a double ISO connector system (Universal). After selecting your primary harness you then select a secondary harness to connect between the ISO connectors and the aftermarket head unit that you have - this is selected based on what brand and type of head unit you have.

Features

• Easy plug and play solution
• ISO connector to suit Toyota/Lexus