Full sized Koss SB45 communication headsets deliver the premium sound of a closed headphone audio experience from legendary Koss. The SB45 enables you to not only hear clearly, but also speak clearly. Featuring Koss’ Clear Voice Technology (CVT), the noise-reduction boom microphone eliminates excessive background noise. This makes PC voice applications, such as speech recognition, much easier to use. The comfortable design of the Koss SB45 will allow you to wear these headsets over an extended period. The large, closed ear cups maximise isolation so you can focus on the task or conversation at hand. These computer headsets easily fold up for compact storage or transportation.