For small businesses and workgroups demanding superior quality at an affordable price, OKI brings you C331dn and C531dn Digital Color printers. Network-ready, they combine fast printing speeds, incredible print quality, duplex (2-sided) printing standard, the ability to print on a wide variety of media, and the legendary reliability of OKI products, backed by industry-leading support. HD Color Printing technology - Both printers utilize this unique OKI process for breathtaking output. HD Color Printing technology combines multi-level LED printheads and microfine toner for precise toner placement; deep, saturated colors; and fine detail on regular copy paper and glossy media. Shop for Oki C531dn toner cartridges below.