Enhanced functionality includes:
The 15-pin Y cable exposes the other signals in the K3S or K3 ACC port for use with other devices. The Key Line Interrupter provides integration for 3rd party devices to also control the KEY OUT signal from the K3S or K3, if required. Examples include SteppIR controllers, external tuners or screwdriver controllers.
A: No. You can use the RCA-to-RCA cables that come in the box with the KPA500 or KAT500.