TeleFlyPro Works with AATDriver V5.It Supports VBI+Audio downlink. We get less tracking latency and more reliability.It use a barometer instead of GPS to measure the altitude. So AAT will track better in tile angle.MFD TeleFlyPro is an enhance unit for MFD AAT(AutoAntennaTracker) system.The main function of TeleFlyPro is to modulate the tracking data into Video and Audio signals. These video and audio signals can be transmitted via a common Video-TX /RX module. With a V5.0 or newer AATDriver, the AAT system is able to demodulate the tracking data from the video or audio signal and use it to track the plane.TFPro’s advanced features include:1) Modulating tracking data both into video and audio signals. It’s more reliable and works with most VTX/RX without audio channel compatible issues.2) TFPro has advanced ,pixel-level black/white OSD function. OSD can be disable if it’s not used.3) TFPro uses a barometer to measure the altitude instead of GPS. The tracker now tracks more accurately than before.4) An optional 100Amp current sensor is available if user needs to measure the current/voltage of the power system of the plane. If you need a full-function AutoPilot device for you plane, we recommend our MFD AutoPilot product.