Couples 3.5mm Stereo cables together or changes a Male connetor to Female This adapter is commonly used to connect different types of 3.5mm audio devices together.
"Changes a cable with a male F connector into a male BNC connector. This adapter is commonly used to connect different types of audio-video devices together. If you hav e F cables already, this adapter will allow them to be used with video gear which has BNC inputs."
