KOSS SB/45 NOISE CANCELLING HEADSET USB OVER EAR NOISE REDUCING CALL

This headset was used while I was working at an extremely noisy call center where music was played on the call center floor. It totally covers your ears and filters out most back background noise as well the music that was played. It was a life-saver, but I no longer work there and do not need anymore. Must have for call-center work. I no longer have the box. It stayed in my desk when I wasn't working so it still in perfect condition. I used it for about 3 months.