The AeroCruze 100 is an affordable and flexible digital autopilot system for Cessna 172, 175, 177, and Piper PA 28 aircraft. Emergency autopilot level button helps to bring the aircraft to a wings-level position. Connects to either handheld GPS or IFR panel mount GPS systems. When connected to handheld GPS, follows programmed flight plans. When connected to panel mount GPS, autopilot follows roll steering commands to fly complex flight plans Similar to lane assist in automobiles, the AEP stand-by mode monitors aircraft bank angle. Autopilot corrects the bank angles greater than 45 degrees by automatic roll command.This AeroCruze 100 (EDMO# 8000-174) is the 2-inch round variation.