HP Docking Systems (EN488AA) 120W HP EN488 4 USB 2.0 ports, Ethernet & modem pass-through, 2 PS/2 ports, serial & parallel connectors, S-Video, VGA, DVI & audio ports Return to your familiar desktop environment or leave the office in an instant with one-handed, one-touch docking and undocking operation Designed to create a space-saving and comfortable work environment this docking station offers full desktop connectivity and features. Support for hot docking means uninterrupted productivity for business users.