Headphones with elegant design that focuses on comfort and reliability. And thanks to the distinctive quality of the sound of Poly you know you'll be hearing excellent.Blackwire 3300 series is fully compatible with plug-n-play USB devices, so users can accept calls in the office or on the move. Their healthy design provides reliability that you can rely on.Increase your confidence in calls thanks to sound of professional quality and personalized fit with headphones that can connect to your devices quickly and easily, and are ready to accompany you wherever you go.Thanks to professional voice quality and personalized fitting, these fully adjustable headphones have 180 degree turntable speakers and a flexible microphone stand.They maintain comfort in long wear thanks to soft headband with lining and soft pillow cups for ears.Improved connectivity for your devices with USB-C cable and attached USB-A adapter. 
