Hi Genesis. The Epson WorkForce Pro WF-3820 uses genuine Epson 822 and 822XL ink cartridges. The ISO page yields differ from between these two cartridges. For the Epson 822 ink cartridges, the ISO page yield is 350 pages in black and 240 pages in color. However, for the Epson 822XL, ISO page yield is 1,100 pages in black or color. Regards, Bobby - The Epson Team.