HP UltraSlim Docking Station. Connectivity technology: Docking. Product colour: Black, Compatibility: HP Elitebook 820 G1 Notebook PC; HP Elitebook 840 G1 Notebook PC; HP Elitebook 850 G1 Notebook PC;..., HP segment: Business. Width: 44 mm, Depth: 368 mm, Height: 107 mm