This conversion cable convert 3.5mm stereo (left/right) to 1/4 TRS audio connection. It connect headphone with 3.5mm port to mixing board's 1/4 headphone jack. It also work with headphone with 1/4 port to a computer or tablet with 3.5mm port. (Connectors: 3.5mm Stereo Male to 1/4 TRS Male; Length: 6ft; Color: Black)