Far End Gear XDU Flexible Earhook Stereo-to-Mono Single Headphone for Left Ear Cord featuring Brite Buds reflective technology, enhancing your visibility at night 45 degree Gold-plated Stereo 3.5mm plug (same as 1/8-inch size plug) Listen in one ear without missing any of your stereo sound 42 inch long cord - Weighs in at 0.4 ounces (12 grams) Stereo plug's circuitry design mixes left and right stereo channels together into one earpiece