HP Colour LaserJet Enterprise M751dn (Replaces the M750dn) A3 Print . 250 sheet output bin. Front door (access to JetIntelligence toner cartridges and imaging drums). Automatic two-sided printing Duplex. 550 sheet tray 2 supports media sizes up to A3. 2nd generation Hardware Integration Pocket (for connecting accessory and third-party devices). 6.9 cm colour graphic display with 24-key pad. Easy-access USB port. 100 sheet multipurpose tray 1 supports media sizes up to 305 x 457 mm and SRA3. Right door (access to the print path). Slot for cable-type security lock. 2 Hi-Speed USB 2.0 Host ports. Gigabit/Fast Ethernet 10/100/1000Base-TX network port. Hi-Speed USB 2.0 device port