One of the less professional aspects of the device is its use of a tricolor HP 990c ink cartridge instead of discrete colors, which could result in more waste. Black output can be printed at up to 600 dpi resolution, which should be adequate for sharp text, and color output can reach an enhanced resolution of up to 2400x1200 dpi when using photo inkjet paper. Though it could be used on a network with an HP JetDirect adapter, the 150-sheet paper tray could be a limiting factor for anything more than light-duty use, and the monthly duty cycle maxes out at 5,000 pages. The device can connect via USB or parallel port, and both Windows and Mac platforms are supported when using USB. The dimensions are 7.72x17.32x17.13 inches, and it weighs 14.65 pounds without the Deskjet 990c printer ink installed, so it is light enough to move around without much trouble. Each uses the same HP 990c printer ink, however, which helps keep costs lower. The 990c model also goes by the names 990cm, 990Cse, and 990cxi, which are available in other countries. Print speeds aren't the fastest in its class, at a maximum of 17 pages per minute in black and 13 pages per minute in color, but advanced features like automatic duplexing and auto paper sensing can save time and money. As part of the professional series, the HP Deskjet 990c marries high-quality color printing with a compact design and affordable price tag.

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