Brand new with shrink wrap. Never opened. - Hear crisp, clear audio. Omnisonic Audio wraps you in your favorite music, shows, and more - Lightweight, breathable, and a comfortable size you can wear for a full day of travel or at the office. Noise cancellation Up to 30 dB for active noise cancellation, Up to 40 dB for passive noise cancellation - Your built in assistant can do it for you. Just ask Microsoft Cortana to play your favorite artist, set a reminder, make a call, get answers to questions, and more. Compatibility Windows 10, iOS, Android, MacOS - Keep it quiet with active noise cancellation you can adjust with an easy on ear dial. Or, turn it all the way down to better hear conversations without removing headphones. Frequency response:20 20 kHz - Use your voice and simple, intuitive controls to adjust the volume, skip tracks, mute your mic, or hang up calls. Audio pauses when you take your headphones off , USB cord length 1.5 meter , Audio cable length 1.2 meter. Sound pressure level output - Up to 115 dB (1kHz, 1Vrms via cable connector with power on). Up to 115 dB (1kHz, 0dBFS over Bluetooth connection)