This adaptor is required to replace factory fitted radio with an aftermarket headunit (Alpine, Pioneer, Kenwood, Sony, JVC etc.). It will convert the car original power and speakers wiring connector to a standard ISO connector. Simply plug one end of the adaptor into your cars wiring harness, and the other end into your new radio, without the need of tools or cutting of wires. ISO HARNESS ADAPTER FITS NISSAN X - Trail 2005 > Micra 2005 > 350Z 2005 > Pathfinder 2005 > Navara 2005 > Patrol 2005