The Jabra Elite 85h Wireless Noise-Canceling Headphones are engineered for superior wireless calls and music experience. Equipped with SmartSound, it analyzes your sound environment and automatically applies your personalized audio, Smart Active Noise Cancellation (ANC) and HearThrough settings to give you the sound you need, when you need it. Smart Active Noise Cancellation (ANC) responds to your environment, switching itself on if it detects unwanted background noise according to the preferences you set within the Jabra Sound+ app. These headphones contain eight microphones, four of which are used by the powerful digital ANC to filter out the noise around you.