Ben,
Sorry, the Dual and other Bluetooth devices are not compatible with the iFly 720. You'll need Wi-Fi, not Bluetooth.  There are several ADSB devices that use WI-Fi, actually more than Bluetooth.  Examples are SkyRadar, Stratus, NavWorx, Clarity, iLevil, FreeFlight and more.  For Bluetooth, it's Dual and Garmin.  Hope this helps.