Plantronics .Audio 622 Stereo USB headset is great for on-line calls. Lightweight, easy to wear and remove, it's comfortable and straightforward to use. Just plug it in and you're ready to make calls or listen to music. Digital Signal Processing technology works with the noise-cancelling microphone to stop echo, reduce noise, boost voice frequencies and deliver crystal clear conversations. The 24-bit Hi-Fi stereo HD sound pumping out of comfy foam ear pads make it a pleasure to use.