3.5mm mono plug to 3.5mm stereo jack FEV-B103By gerry / February 20, 2021 3.5mm mono plug to 3.5mm stereo jack FEV-B103A.3.5mm mono plug to 2.5mm mono jack; B.3.5mm mono plug to 2.5mm stereo jack; C.3.5mm mono plug to 3.5mm stereo jack