This cable provides a simple to use interface for a Trig Avionics TT21 or TT22 transponder.
This interface simply plugs into the rear of the transponder and typically only 4 wires have to be connected to an external control head.
The MGL iEFIS touchscreen will acts as the transponder control head. The Trig head unit becomes redundant and cannot be used. You only need to buy the Trig transponder body by itself.
