| Power and operating requirements | 
        
        
            | Minimum system requirements | 
            PC: Microsoft® Windows® 7 ready. For more information go to www.hp.com/go/windows7. Some features may not be available. Windows Vista® (x32 and x64), XP Home, XP Professional, Server 2003, 2000 (drivers only): 512 MB RAM, 350 MB available hard disk space, CD-ROM drive, USB port 
            Macintosh: Mac OS X v 10.3.9, 10.4, 10.5, 10.6; 256 MB RAM, 150 MB available hard disk space; CD-ROM drive, USB port | 
        
        
            | Compatible operating systems | 
            Microsoft® Windows® 7 (32-bit/64-bit), Windows Vista® (32-bit/64-bit), Windows® XP (32-bit/64-bit), Windows® Server 2003 (32-bit/64-bit), Windows® 2000, Mac OS X v 10.3.9, 10.4, 10.5, 10.6, UNIX, Linux (see http://www.hplip.net) | 
        
        
            | Macintosh compatible | 
            Yes | 
        
        
            | Power supply | 
            Input voltage: 110 to 127 VAC (+/- 10%), 60 Hz (+/- 2 Hz); 220 to 240 VAC (+/- 10%), 50 Hz (+/- 2 Hz) | 
        
        
            | Power consumption | 
            570 watts (printing), 8 watts (ready), 8 watts (sleep), 0.4 watts (off) | 
        
        
            | Power consumption footnote | 
            Values subject to change. See http://www.hp.com/support/ljp2055 for current information. Power numbers are the highest values measured using all standard voltages. | 
        
        
            | Recommended operating temperature (Fahrenheit) | 
            63.5 to 77º F | 
        
        
            | ENERGY STAR® Qualified | 
            Yes |