Logitech SmartDock Flex Expansion Kit 960-001213 B&H Photo Video
Logitech SmartDock Large Skype Room System - video conferencing kit - with SmartDock Extender Box, Surface Pro (i5, 128GB, 4GB), Logitech Group + Expansion Mics / Hayatspro
LogitechSmartdock Flex Extender - Net Universe Shop