For easy switching between landline phones, soft phones, and -- with the use of a Plantronics Bluetooth USB headset -- even mobile phones. Lights indicate connectivity and call status Wideband ensures natural sounding audio Compatible with PCs, Macs, and all leading landline and soft phones that support the Plantronics Hub Compatible with wired, wireless and Bluetooth USB headsets such as Blackwire, Savi and the Voyager series (only compatible with Bluetooth Dongle BT600)