The Plantronics Savi W440-M is an expensive but well-built enterprise-level DECT 6.0 headset.
The Plantronics Savi W440-M headset has a sleek design, with a variety of wearing styles and ear gels to suit different comfort levels; Features include compatibility with PC and Mac and support for multiple softphone and VoIP software applications
The Plantronics Savi W440-M doesn't have Bluetooth and is quite expensive.