CC 550 is the best professional headset. The CC 550 is the top-of-the-line, binaural headset that offers powerful, precise sound to both ears for optimal understanding. It features X-large, padded ear caps to block out noise and increase comfort. The self-adjusting ball-mounted speaker capsules allow perfect fitting to the head. While ultra noise canceling blocks out ambient noise, the 300° adjustable microphone boom allows the microphone to be positioned exactly for optimal speech clarity.