HP LaserJet Enterprise M611dn Black (A4, Normal): Up to 61 PPM; Black (A4, Duplex): Up to 50 PPM Up to 275,000 Pages (A4); Recommended Monthly Page Volume: 5,000 to 25,000 Print Only. 6.9 cm LCD with Keypad. Standard 100-Sheet Tray 1 and 550-Sheet Tray 2. Automatic Duplex. HP PCL 6, HP PCL 5 (HP PCL 5 Driver Available from the Web only), HP Postscript Level 3 Emulation, Native PDF Printing (v 1.7), Apple AirPrint. HP ePrint. Built in Network. Wireless is Optional