Bang & olufsen signature sound - listen music the way the artist intended for a true sound experience advanced active noise cancellation - immerse yourself completely in the music in total silence transparency mode - amplify surrounding sounds so you can still hear the world around you made of authentic materials such as anodized aluminum and natural leather that ages beautifully streamlined on-ear design makes the perfect traveling companion and provides optimal comfort proximity sensor - h8i automatically pauses when taken off improved voice quality during calls with two dedicated microphones keep the music going with up to 30 hours of playtime on one charge features three control buttons for volume, bluetooth and play/pause bluetooth 4.2 technology 40mm electro-dynamic driver frequency: 20-22,000hz compatible with beoplay app includes: 1.2 m audio cord with 3.5mm jack 1.2 m usb-a to usb-c cable flight adapter carrying pouch _______________________________________________________