Key benefitsEnvironmentally friendly• To save toner and paper, this machine supports Eco feature.• To save paper, you can print multiple pages on one single sheet ofpaper (see Advanced Guide).• To save paper, you can print on both sides of the paper (double-sided printing) (see Advanced Guide).• To save electricity, this machine automatically conserves electricityby substantially reducing power consumption when not in use.Print with excellent quality and speed• You can print with a resolution of up to 1,200 x 1,200 dpi effectiveoutput.• Fast, on-demand printing.For ML-451x Series:- For single-side printing, 43 ppm (A4) or 45 ppm (Letter).- For duplex printing, 27 ipm (A4) or 28 ipm (Letter).For ML-501x Series:- For single-side printing, 48 ppm (A4) or 50 ppm (Letter).- For duplex printing, 31 ipm (A4) or 32 ipm (Letter).Convenience• Samsung Easy Printer Manager and Samsung Printer Status (or SmartPanel) are programs that monitors and informs you of the machine’sstatus and allows you to customize the machine’s settings (seeAdvanced Guide).• AnyWeb Print helps you screen-capture, preview, scrap, and printthe screen of Windows Internet Explorer more easily, than when youuse the ordinary program (see Advanced Guide).