The Lenovo ThinkPad Thunderbolt 4 Workstation Dock (part number 40B00300US) is a docking station designed to expand connectivity for compatible ThinkPad workstations. It provides a single Thunderbolt port for device connection, enabling high-speed data transfer and display output. For display connectivity, it includes one HDMI 2.1 port and two additional display outputs (type not specified in data).