EC systems are designed for aircraft to aircraft visibility. An EC device will not meet standards to allow you to enter controlled airspace of a class in which a transponder is mandatory or a Transponder Mandatory zone (TMZ). In addition, EC device transmission must be deactivated when used in an aircraft with an Extended Squitter (ES) ADS-B Out Enabled Transponder in use. The SkyEcho web based configuration page (188.8.131.52) allows you to turn off the transmit function while still being able to receive traffic for display on the compatible app.
Note: a Mode S transponder is ADS-B enabled only when it is connected to a compatible GNSS source, which can be either internal or external to the transponder.