It is an active noise cancelling headset using Bluetooth aptX technology. It provides excellent wireless audio, suppresses the sound around you, enables you to enjoy the most important music. It can provide up to 20 hours of wireless playback time for effective noise reduction, or more than 30 hours of wireless playback time without ANC. Its custom 40mm dynamic drive delivers robust sound and balances sharpness at the right low volume - ideal for users who need the best audio effect. The earmuff design features a soft ultra-fine fiber wrapped luxury headband, 3D hinges, ergonomic design, black anodized metal details, and a landmark appearance for the headset.