Transform your black and white documents with the B840, the A3 printer with the speed, versatility and footprint of an A4 device. With sharper mono output, provided by OKI's innovative digital LED technology, the B840 brings A4 and A3 mono printing closer to your work group. Gone are the days of having to decipher your spreadsheets and diagrams with a magnifying glass. The B840 provides the convenience of fast desktop A4 printing speeds of up to 40 ppm with the capability to print your documents at a size that gives them and you a new perspective. The B840 brings affordable A4 and A3 mono printing to every business, large or small.