Active Noise Cancelling Functionality: Reduces environmental noise and distractions by up to 25dB for an immersive auditory experience that lasts up to 15 hours per charge Increase Awareness with Monitoring Mode: Clearly hear airline or subway announcements and what's around you with the press of a button Built-In MEMS Noise Cancelling Microphone: Enables for crispy phone calls and undisturbed voice transmission while featuring a reduced footprint Feature-Packed Headphones: Comes with an active noise cancelling slider, monitoring mode button, inline controls for volume, audio track, and calls, as well as a built-in mic; weighs only 0.8 oz Sleek, Durable Aluminium Build: Metal alloy black matte finish provides extra durability in addition to an elegant, stealthy look