The plantronics audio 478 usb stereo headset folds up to travel so you get great audio on the go lightweight and with intuitive volume mute and call control buttons it39s comfortable and very easy to use and it39s skype certified with an advanced noise cancelling microphone and 24 bit hi fi stereo hd sound for crystal clear audio and conversationsnoise canceling microphone for clear conversations the plantronics audio 478 usb stereo headset uses