NSEN Replacement 1.2M Extension Cable Cord For bose quietcomfort 15 Headphone Headset New & High Quality Replacement Extension. Use as a spare or replacement in case your original cable is lost or damaged. Headphones or Audio Extension Cable Length: 1.2 Meter Compatible Products QuietComfort 3 QuietComfort 15 and all models of Bose on-ear, in-ear and around-ear headphones.