This is the Hitec Trainer Cord with DIN Jack Adapters.
FEATURES: For Hitec transmitters using either DIN or stereo jack trainer plugs
Allows an instructor to override a beginning pilot to bring aircraft
INCLUDES: 8.1' (2.5m) Cable with Male Stereo Jacks
Student transmitter DIN to Female Stereo Jack Adapter
Master transmitter DIN to Female Stereo Jack Adapter
REQUIRES: Connecting between master (instructor) and student transmitters