BlueAnt Zone X Wireless Active Noise Cancelling Headphones remove up to 35dB of unwanted background noise. Hear the world around you with Advanced Transparency mode that amplifies your surroundings, so you never miss a beat. Automatically mute your music so you can listen to announcements or conversations by cupping your right ear. Up to 35 hours of Bluetooth playback and up to 24 hrs of ANC or Transparency playback. * *play time is measured at 80% volume and depends on music and environmental factors. Simply tap and hold to start Siri/Google. Take your calls on the go with the built-in microphone. Tap or slide into your music with the intuitive touch pad on the right ear cup. A full charge in 3 hours via USB C or a 15 minute top up for 3 hrs playback.