HP Photosmart A430 Photo Printer 4800 x 1200 optimized dots per inch (dpi) for enhanced print quality Up to 10 sheets of (4 x 12 inches) photo paper for panoramic printing Up to 20 sheets of (4 x 6 inches) photo paper Uses HP 110 Ink Cartridge (CB304AN#140) Microsoft Windows 98, 2000 Professional, Me, XP Home, XP Professional, XP Professional x64, and XP Starter Edition, Vista Ready, Mac OS X v 10.3.9 or higher