iLevil's Astro Link combines a state-of-the-art aviation grade AHRS technology, dual-band ADS-B Receiver, and an internal WAAS GPS for navigation into into one of the best portable aviation devices available. Pre-Oshkosh pricing of $539 (MSRP $599).
https://www.iflygps.com/STORE/Product/oshkosh/astro-link-ahrs-gps-ads-b-in-sale
https://www.iflygps.com/STORE/Product/oshkosh/astro-link-ahrs-gps-ads-b-in-sale