- 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