These docks have been removed from a working environment and inspected by our technicians for any defects. These units are in great physical and working condition. These units are compatible with HP Ultraslim EliteBooks. EliteBook: 720 G1-G2, 725 G2-G4, 740 G1-G2, 745 G2-G4, 750 G1-G2, 755 G2-G4, 820 G1-G4, 840 G1-G4, 850 G1-G4, 1020 G1, 1040 G1-G3. EliteBook Folio: 9480m, 9470m. EliteBook Revolve: 810 G1, 810 G3. Pro x2 612 G1. ProBook: 640 G2-G3. ZBook 14. ZBook 14u G4. ZBook 15U G3-G4 Mobile Workstation. Thanks for looking, make sure to check out our store for other great products and deals!