Plantronics blackwire c315 corded monaural usb headset with 35mm connection offering pc wideband noise canceling microphone the blackwire 315 headset provide a truly outstanding audio experience making them ideal for voice music and multi media the dynamic eq feature optimizes your voice quality when on calls and automatically adjusts the eq settings when youre listening to music or multi media enjoy the freedom of a secure fit a lightweight metal headband offers durability and a cus