C610 Series Digital Color printers are practically in a class by themselves. They combine fast, highquality color output with best-in-class performance, including unmatched print speeds. Models come with standard features such as automatic duplex (2-sided) printing (C610dn, -cdn and -dtn4), extra paper capacity (C610dtn4), a 16 GB SD memory card (C610cdn4), plus the legendary OKI PrintingSolutions reliability.