Plantronics CS520XD Series Wireless Headset System (8828501). International Customers: All electronic products are packaged for sale in the US with US voltage. Country of Origin: Mexico. This item is brand-new, factory sealed. Hands-free up to 350 feet. Over-the-head binaural: covers both ears for comfort, focus and blocking out background noise. An adaptive power system optimizes for range and talk time by automatically downshifting to low power when the headset is close to the base to save battery life. Audio controls for volume/mute at your fingertips. Conference in up to three additional CS500 series. Use with electronic hookswitch cable or handset lifter to remotely answer/end calls. Maximum Battery Run Time. CS520XD Series Wireless Headset System. Opened items must be in re-sellable condition including original packaging and all accessories. Read our full policy. We focus on making purchasing online a pleasant experience. Our sales office is located in beautiful town of Redondo Beach, California, just a few miles South of Los Angeles International Airport. We do not stock any inventory at our sales office. Why are our prices so low? We have modeled our business much like a wholesaler. We sell in huge volume and have streamlined our operations to provide you with the best combination of price and service available anywhere.