The Plantronics Savi 8220M Wireless DECT Headset System features wireless multi-device connectivity that allows you to transfer audio between headset and mobile phone This headset has a noise-canceling microphone with a Close Conversation Limiting mode, which is designed to block background noise The Savi 8220M Wireless DECT Headset System has built-in one-touch controls that answer and end calls, manage volume, and turn the mute on or off An adaptive power system allows you to downshift to a low power mode when the headset is close to the Savi 8220M base to save battery life This feature contributes up to 13 hours of talk time before needing a recharge The headset's microphone boom is designed to be flexible so it can be positioned at an ideal distance from your mouth for optimized voice quality The Savi 8220M Wireless DECT Headset System has integrated voice alerts that notify you when you've muted the headset or have stepped out of range A ringer is conveniently built-in to the base with volume controls for off, low, medium, and high Certified for Skype for Business