Dell Docking Station For Dell Inspiron 7640 2-in-1 180W Adapter-HDMI-DisplayPort
Expansion / Connectivity (Interface) : 2 x display / video - DisplayPort - 20 pin DisplayPort (1.4). Watts: 180W. The Dell Thunderbolt™ Dock – WD22TB4 is a high-performance docking station designed to expand your laptop's capabilities.