This Data Connector is for the StackMat G5 Timer. The cable is 6 feet long. It has a 90 degree 2.5mm jack on one end, and a standard 3.5mm jack on the other.

Also compatible with the StackMat G4 Timer.

Please note that this item requires a dedicated microphone jack or an external splitter. It is not compatible with mobile devices or headphone/microphone combo jacks.

You can find the relevant splitter here.