FrSky TANDEM X20RS Transmitter Internal TD-ISRM RS RF moel for RC EU Car Trucks
"※FrSky X20RS TANDEM Transmitter Internal TD-ISRM RS RF module for RC Car Trucks. Manufacturer: Frsky. The X20R and X20RS have changed from the original X20 design in appearance. Internal RF module: TD-ISRM RS.