The AP74 Dedicated Autopilot Interface Module adds panel-mounted controls and LED light status indicators to your autopilot. A multi-purpose value knob allows quick adjustment of the BARO setting and the bugs used with the Autopilot. The AP74 adds the abilities to pre-arm which modes will be flown upon autopilot engagement and pre-select the target altitude and heading/track. Additional features include a built-in light level sensor to automatically adjust the screen brightness, and synthetic voice alerts when connected to an auxiliary input on your intercom.