Laptop docking station external interfaces usb 20 usb 30 usb 20 ports 1 usb 30 ports 1 compatible with hp elitebook 2170p hp elitebook 8470p hp elitebook 8470w hp elitebook 8530w hp elitebook 8560p hp elitebook 8570p hp elitebook 8740w hp elitebook 8760w hp elitebook 8770w hp mt40 hp probook 5330m hp probook 6360b hp probook 6440b hp probook 6460b hp probook 6465b hp probook 6470b hp probook 6475b hp probook 6540b hp probook 6545b hp probook 6550b hp probook