- Dual stereo hi-fi speakers - Active Noise Canceling (ANC) - 100ft of bluetooth wireless Range from your computer with the Link 380A USB adapter (included) - 10-microphone technolgoy with noise canceling. - 37 hours of battery time when full charged. - Large 40mm circumnaural speakers - Unified Communication Certified - Busy light indicator visible from all directions - Hide away Microphone boom arm can be integrated into the headband when not on a call or simply listening to music as a headphone. - Motion sensors detect when headset is worn