Universal volume control cable that comes with 6m of cable and separate left/right volume controls. Requires a standard stereo headphone, such as the PX30. To be used with: Set810-S, Set250-J, and Set100-J. Description:This stereo headphone volume control is equipped with a standard 1/8" (3.5mm) stereo mini plug, and features separate left and right earpiece volume buttons. The unit is...