The Jabra M5390 Multiuse Bluetooth headset connects simultaneously to mobile phones and desk phones - or to mobile phones and PC softphones (via the included A335w USB adapter). The M5390 combines the sound and range performance known from office headsets with the convenience of a mobile headset. Based on next generation Bluetooth technology, it offers true wideband audio. The extended wireless range provides up to 200 feet of range. The design and wearing style is optimized for office staff, managers and specialists who spend most of their time in the office ??“ and less on the go. For optimum call clarity in loud office environments, the microphone features noise canceling technology. The Jabra M5390 can also seamlessly connect to a mobile phone or PC-based softphone via the USB adapter. The Jabra M5390 Multiuse base is compatible with most desk phone systems, and the adapter is compliant with a wide range of PC-based softphones including Microsoft?® Office Communicator 2007, Cisco IP Softphone, Skype?„? ...