HI-RES AUDIO WIRELESS: The WH950NB headphone supports both Hi-Res Audio wireless with LDAC certification, which gives you a wide range of details, and clarity for the ultimate listening experience. ACTIVE NOISE CANCELLATION WITH AMBIENT SOUND: There are 2 active noise cancellation modes, so that users could choose ambient sound or wind reduction in different scenarios to create an ideal environment. CRYSTAL-CLEAR CALL: The WH950NB is built in 4 microphones to ensure clear voice calls.These microphones are integrated with the audio signal processor to direct your voice, which adds an extra layer of crystal-clear quality to your important conversations.