Complete A3 Pro Package. Complete redundancy, precision accuracy. Includes the A3 pro upgrade packages to make a redundant UAV flight controller. Be safe and accurate with the DJI A3 flight controller and IMU in Canada. The first consumer available redundant IMU compass and flight controller available is so easy to use and a very nice edition to any high end commercial and industrial UAV. DJI is setting the new standard in UAV's. The only issue we have with this unit is it does not come with folding GPS masts. We carry the masts and strongly suggest you pick up a few so your UAV fits in its case, your car, and so the GPS masts can be folded down for safe keeping.