The SDW 3 BS base station is a flexible communication hub that works with all SDW 5000 Series headsets and can pair up to 4 SDW 5000 headsets for conferencing. For hot desking it is also possible to connect a wired Sennheiser headset, speakerphone or a Bluetooth® headset using the USB port on the side of the base station when the USB port is not used with a dongle for mobile connectivity. As an IT manager, you can upgrade from single to dual connectivity to handle flex-working via the BTD 800 dongle enabling connectivity to mobile devices.