Microsoft Surface Headphones 2 Black

For all-day comfort, improved sound quality, and extended lifespan, Surface Headphones 2 feature 13 levels of active noise cancellation with voice, touch, and fingertip controls. [Compatibility] Windows 10 or later, Android 4.4, iOS 9, Bluetooth 4.1/4.2 [Speaker] 40 mm Free Edge driver [Sound pressure level output] Max. 115 dB (1kHz via cable when powered on) , 1Vrms) / up to 115 dB (1kHz, 0dBFS with Bluetooth connection) [Noise canceling level adjustment] Active noise cancellation up to 30 dB / Passive noise cancellation up to 40 dB [Buttons/controls] Power button, microphone Mute button, volume control dial (right ear), noise canceling control dial (left ear)