Plantronics Explorer 500, Black, Bluetooth, 203621-05 (Certified Refurbished) This Certified Refurbished product is tested and certified by the manufacturer or by a third-party refurbisher to look & work like new, with limited to no signs of wear. The refurbishing process includes functionality testing, inspection, reconditioning and repackaging. The product ships with all relevant accessories, a minimum 90-day warranty & may arrive in a generic white or brown box.Only select sellers who maintain a high performance bar may offer Certified Refurbished products on Amazon. Music, GPS navigation, and much more besides Can be worn comfortably on either side DeepSleep mode extends battery life GSMA-certified HD audio quality