FrSky FF vs. FrSky DF

[coveredup]

http://www.hobbyking.com/hobbyking/stor ... le_RX.html

http://www.hobbyking.com/hobbyking/stor ... le_RX.html

What exactly is the difference in the two systems? Maybe i missed it in the description, anyone know?

Thanks

[quarry44]

The top one includes telemetry option,the other does not.With the telemetry unit,you can use both types of frsky rx,the FF only uses non-telemetry rx's