Poly Savi 7210 Office Single-Ear Headset for desk phones lets you confidently roam up to 400'. Optimize range, save power and maximize office space with the DECT adaptive power system. It automatically adjusts wireless signal strength based on distance from the headset base. Charge lasts up to 12 hours of talk time and only takes up to 3 hours to charge. Docking charge indicator lets you know when the headset is fully charged. Collaboration is simple since teams can conference up to four headsets on a single base. Wireless headset offers instant integration with more than 800 analog and IP desk phones from industry-leading makers, including a wide range of phones that Poly offers. Ear cushion is made of artificial leather for all-day comfort. Headband adjusts to fit your head shape.