Features High-Quality Ledger-Format Printing: Even at a blazing 180 pages per minute, the RZ990’s 600 dpi print quality remains consistent from the start of your print job to its completion. RISO i Quality SystemTM: The RISO RZ990 is equipped with the RISO i Quality System. Two-way communication between RISO Quality System equipped printers and their supplies is made via integrated RF (Radio Frequency) tags. These tags relay information to the printer, assuring optimum first print quality and superior output throughout the entire job.