Five Most Popular Plantronics Headsets/Computer Headsets – July 2012 1) Blackwire C320 – The Blackwire C320 dual headset is perfect for conference calls, web-based training videos, and multi-media applications. You have inline controls at your fingertips, which makes it quick and easy to control calls. The dynamic EQ feature optimizes sound for voice, music, and multi-media, making this headset a favorite of many users! … Continued