plantronics plantronics voyager focus 2 uc usb aWith the Voyager Focus 2 headset, Plantronics has created a "focus zone." You only hear the conversationthanks to three levels of hybrid Active Noise Cancellation (ANC). Thanks to the professional grade microphones with Acoustic Fence technology, the person you're talking to only hears you. Hybrid Active Noise Cancelling with three levels Professional microphones with Acoustic Fence technology