15 HP advanced docking stations plus power adapters. All work, are 3-5 years old and work with a number of older HP EliteBook & ProBook laptop models. Check out hp.com for compatibility. Each was $200 new when purchased.
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Price is for the lot of docking stations and adapters
Has VGA, DVI, Display Port video outputs (no HDMI)
PS2, LAN and multiple USB ports
Also features a bay for external DVD drive.