Adapts your older 4 pin to the new 6 pin for use while programing with a PV3.
4 pin PV3 wire ---> to 6-pin machine.
Or
6 pin PV3 wire ---> to 4-pin machine.
Ex. let's say you bought a PV3 for your 2018 Pioneer 1000. It has a 4-pin connector.
Now you just bought a new 2022 Pioneer 1000/Talon. Your new machine has a 6-pin connector. With this adaptor, there is no need to buy a new PV3 when you can use your current one.
Or. You have a 2019 Talon. But ordered a PV3 for a 2021. 2021 has a 6 pin, while your machine is a 4 pin.