Black & White Laser Printer Duplex (2-sided) Printing: Integrated Duplex Print Speed: Up to 47 ppm Recommended Monthly Page Volume: 2,000 - 20,000 Pages With exceptional performance and secure design, the MS631dw delivers enhanced productivity of up to 47 pages per minute* and a toner yield of up to 31,000 pages**. Fast time to first print, superior print quality and easy-to-use touch screen.Proprietary technologyWe own core technology across hardware, firmware, services and solutions, creating seamless connections designed to reduce the risk of security gaps between your document, your device and your network.SustainabilityWith certifications in Energy Star®, Blue Angel, RoHS, EPEAT® Silver. Models are sustainable for today and beyond. Lexmark is an industry leader of recycled content with products using at least 39% PCR content and continual focus on improvement. This line is also engineered for Long Life and designed to last and reduce waste.Secure by designLexmark expertise helps