We figured the ADS-B portable market would die with the 2020 mandate a little over a year away. But a crop of three new ones appeared recently and AVweb's Paul Bertorelli took them for a video spin in this in-depth review of the Stratus 3, the Sentry and Dynon's DRX.
This is a companion discussion topic for the original entry at https://www.avweb.com/multimedia/votw/ads-b-portables-reviewed