Electronic Control Unit (ECU)Garmin's Electronics Control Unit (ECU) is made specifically for the GHP 12 Autopilot System.Compatible Devices: GHP 12 Autopilot System; GHP Reactor Mechanical/Retrofit/Solenoid Corepack; WARNING: This product can expose you to chemicals which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to P65Warnings.ca.gov. - cis2:mm5mnJlm -