The Zebra QLn420 4-inch mobile printer heralds the introduction of the next generation of Zebra"s terrifically popular QL product family. Offering dozens of advancements from the inside out, the QLn series is designed to be fully backwards compatible, yet easier to use and manage. It"s ideal for use by retail and health care organizations - which compose the majority of the customers already using the previous-generation QL/QL Plus versions.