The Stratus ESG provides a simplified “all-in-one box” solution for 2020 compliance with a Stratus ES transponder, as well as a non-certified ADS-B receiver.Stratus ESG (ADS-B OUT) 1090ES transponder Built-in WAAS GPS GPS Antenna Included Stratus 3i (ADS-B IN) Non-certified receiver made only for Stratus ESG Backup AHRS Integrated with ForeFlight on iPad Requires connection to Stratus ESG