Dual-mode active noise canceling (ANC) lets you choose your preferred noise-reduction level.Roam freely, with a range of up to 30 m/98' from a Class 1 Bluetooth device.Listen time of up to 24 hours and a 3.5 mm audio cable facilitates in-flight use.Boomless design.Dual-mode ANC.Smart sensory technology.Intuitive controls.Extended range.Plantronics signature audio.Dynamic mute alert.