Microsoft Surface Headphones

• 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.
• 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).
• 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.

From the manufacturer Turn it up, tune it out Crisp, clear audio envelops you in your music. Easily control volume and adjust noise cancellation levels with on-ear dials. Even your voice is captured with exceptional clarity. Get comfortable Listen in comfort and style all day with soft ear cups and lightweight design. Use voice or touch to adjust volume, skip tracks, mute your mic, and end calls. Say hello to your new assistant Use your voice to get more done and leave your hands free. ?Hey Cortana, join my meeting.? She can play your favorite artist, make calls, check your schedule, and more. Connect to your world Pairing to your phone or computer is easy. Listen throughout your day with up to 15 hours of battery life and fast charging for almost an hour of music in just 5 minutes - plus up to 18 hours of battery life by turning off Cortana voice activation.3. Immerse yourself in silence Adjustable Active Noise Cancellation technology means you choose how much you tune out. Turn up the silence on planes, trains, or when surrounding noise is at its loudest. Turn it down to adjust when you want to be more aware of what?s going on around you, like in the office or on city streets. Don?t miss a beat with intelligent shortcuts All you have to do is ask. ?Hey, Cortana. What?s on my today?? Cortana, your intelligent assistant, can play your favorite artist, start calls, answer questions, and more. She?ll check your schedule, send an email, or remind you about a task. From your doorstep to your office, on the train or in the air, listen in comfort and style All day. Your music and phone calls sound spectacular with rich, clear audio and adjustable noise cancellation. And use your voice to get more done with your hands free. ?Hey Cortana, skip to the next song.?1