The WH950NB headphones are equipped with intelligent, active noise cancellation algorithms that remove surrounding noise. There are two active noise cancellation mode selections to meet everyone's needs. Furthermore, users can choose between ambient sound or wind reduction in different scenarios to create their ideal environment. The WH950NB uses four built-in microphones to ensure clear voice calls. These microphones are integrated with the audio signal processor to direct your voice, reduce irritating background noise, and suppress wind noise adding an extra layer of crystal-clear quality to the conversations that matter most. The WH950NB has a 40mm composite titanium film driver that delivers exceptional sound. It accurately presents natural and balanced audio for all genres of music. The WH950NB headphones are ideal for providing next-level sound with more excellent resolution and cleaner sound. With a 55-hour battery life perfect for long road trips, you can enjoy up to 34 hours of playback time with ANC. In addition, you can get an extra 7 hours of battery life with a simply 10-minute fast charge. Playback time may vary depending on surroundings, volume level, and audio sources.