VXi 203305 VXi UC ProSet Lux 5031U Plus Stereo USB Headset with N/C Microphone and Presence Indication for Unified Communications Superior noise canceling eliminates background noise (up to 95 percent) and improves communication. Wideband audio (HD Voice) provides clearer conversations and greater productivity. Built-in LED presence indicator designed around established UC standards. Plug-and-play USB interface - no drivers needed. Inline call answer/end, mute and volume controls.