This conversion cable convert and extend 3.5mm stereo (left/right) to 1/4 TRS audio connection. It connect headphone's existing 3.5mm cable to mixing board's 1/4 headphone jack. It also work on headphone's with 1/4 port and connect a computer or tablet's existing 3.5mm cable. (Connectors: 3.5mm Stereo Female to 1/4 TRS Male; Length: 10ft; Color: Black)