1-BUD Gold earphone Stereo sound is played in a single earpiece and does not require any adapters The 1-BUD earphone is compatible with most types of audio products Gold plated earphone plug for static-free contact and a wide range of bass, mid-tones and higher frequencies Cord is thick and quite flexible with a standard 3-conductor male 3.5mm (1/8-inch) stereo plug Stereo plug has 3 conductors (2 insulating black bands) to mix left and right audio channels into single earpiece