Bose QuietComfort © 2 Acoustic Noise Cancelling Headphones Standard

Acoustic Noise Cancelling® headphones. TriPort® acoustic headphone structure. Active equalization. Single earcup audio cable. Detachable audio cable with built-in Hi/Lo switch. QuietComfort® ear cushions. Adjustable headband. Low battery-life indicator. Dual-plug adapter. ¬" stereo-plug adapter - Converts from a 1/8" (3.5 mm) headphone plug. Portable carrying case.