This cable is used for LANC control of supported cameras. Mostly SONY proffesional series supports LANC input. For example Sony FX6 provides full control via LANC (REMOTE).
Some other (non Sony) cameras are not suggested to control via LANC and we do suggest USB control instead. If you are unsure, contact us.
If buyed separately, plese remark version of your Entire (rev1 / rev2 / rev3) in the order note or by mail.