Plantronics 203947-01 Savi W440-M Headset, Wireless, DECT 6.0 Manage PC voice communications and multi-media with the light DECT wireless headset on the market Hot swappable battery lets you change battery mid-conversation delivering unlimited talk time One-touch call answer/end/flash, mute from the headset for simple PC call management An energy-efficient adaptive power system, delivers longer talk and standby times DECT technology provides better audio; eliminates interference from Wi-Fi networks