Dots per inch or dpi: This can range from 300-1440 dpi. The higher dpi, the better the print quality. However higher dpi does cost more.

Pages per minute or Ppm: Speed ranges from 2-6 Ppm. When comparing, buy the fastest speed possible.

Monochrome or Color: Most inkjet printers can print in color. Others can be upgraded to color with an upgrade kit.

Fonts: Some inkjet printers come with built-in fonts. This speeds up printing and allows your printer to handle more fonts per page.

RAM: Some inkjet printers come with built-in RAM. This speeds up the printing. The more the merrier.

Sheet feeder: Make sure the feeder will handle envelopes. Most will, but a few will not.