1-Bud-Pro-Gold Earphone 1-BUD technology mixes Stereo Left and Right Stereo Channels into one earpiece Heavy-Duty Cord is a newer soft, flexible cord that is strong enough for daily use Earphone has stylish all-white coloring with very attractive silver trim 3.5mm Stereo 3-Conductor Plug is Compatible with most audio devices Will plug into and work equally well with Mono and Stereo jacks.