3.5mm mono plug to 2x3.5mm stereo jack adapter this 3.5mm mono plug to 2x3.5mm stereo jack adapter converts two 3.5mm stereo plugs to single 3.5mm mono plug.With its full molded construction, this splitter will split the audio signal without a loss of quality.Black molded plastic construction nickel-plated contacts connector 1: 3.5mm mono plug connector 2: 2x3.5mm stereo jack use with pc, stereo, mp3 players external length / height: 35mm body width: 20mm