The Plantronics Savi W8220M is a wireless headset that connects to a desk phone, PC, and mobile phone. The wireless headset system provides the freedom of long-range wireless communication. If you have a noisy office and you need to concentrate, Active Noise Cancelling (ANC) in the speakers block out most of the background noise. It also makes call management effortless with three-way connectivity that lets you switch seamlessly between all three; PC, desk phone and mobile. The Plantronics Savi HL10 headset lifter with straight plug can be used with Savi Office convertible headset. The lifter fits on your telephone, letting you answer calls with just the touch of a button. The HL10 headset lifter automatically takes your handset off hook.Savi W8220M Features:NewDECT 6.0 Technology1.9GHz Wireless FrequencyMicrosoft Skype for Business CertifiedOver the Head Binaural Wireless HeadsetNoise Cancelling Microphone w/ Close Conversation LimitingUp To 13 Hours Talk TimeUp To 50 Hours Standby TimeBluetooth v4.2580 ft Line Of Sight RangeHi-fi Stereo SoundActive Noise Cancelling (ANC)3 Hours Charge TimeThree-way ConnectivityFlexible Microphone Boom DesignMultiple Voice PromptsSoundGuard DigitalG616 Anti-Startle (During Calls)Multi-Unit ConferencingFrequency Response: 100 - 6800 Hz (Wideband), 20 Hz - 20 kHz (Multimedia)Speaker Sensitivity: 118 db SPL MaxSpeaker Impedance: 32 ohmsSavi HL10 Lifter Features:Automatically Lifts Handset and Returns It to CradleEnables Remote / One Touch Controls (w/ Plantronics Headset)Quick & Quiet OperationCompatible w/ Most Desktop PhonesNo Desktop Footprint