This is the Firstech FTI-FDK2 plug and play T-harness, for Ford, Lincoln and Mercury vehicles with either key start or push button start. Covering both start types in one harness is useful — it means you don't need to identify which your vehicle has before ordering, which is a common source of wrong parts. A T-harness plugs in between your vehicle's factory connectors and your remote start module, so most connections are made by pushing plugs together rather than cutting and soldering. This is not a remote starter. It's the harness only, with no electronics of its own. You also need a Compustar FT7, CM9 or CMX series controller, sold separately. Check fitment before ordering Harness coverage splits by generation, so the right part depends on your exact year. Search your vehicle and we'll show you the complete solution we'd install ourselves. Or call us on 647-439-4485.