Plantronics Savi W445 M USB wireless headset for Microsoft Lync 2010. with unlimited talk time. It's design so you can talk without ever running out of battery. W445 M comes complete with an extra battery & Deluxe Charger kit so you can talk non-stop, forever. W445 M is the lightest headset on the market. A hot swappable battery for unlimited talk time, up to 300ft wireless range. Experience best in class computer softphone sound quality with a versatile headset that can be worn three ways to match your personal style, Making this headset the ideal choice for busy people that makes to make PC/VoIP phone calls.