At $999, the Flight Stream 210 adds additional capabilities. It connects to the GDL 88 and 69 units just like the 110, but you can can also stream information to and from Garmin's GTN 650/750 and GNS 430W/530W navigators. What this means is the unit can transfer highly accurate AHRS information to the portable units. Even better, flight planning data can be transferred between the panel-mounts and portables, allowing you to create a flight plan at home and load it directly from your tablet or phone into the panel mounted navigator. Garmin claims the sync between the units is as simple as a couple of screen taps, and changes to the flight plan in flight can be transferred between units just as easily.