The screen should be easy to read in varying shades of light, including daylight. After all, if you can't see the characters on your display, you won't be able to use the PDA . Fortunately, most handheld PCs have backlit screens that increase the sharpness of characters and icons. Screen resolutions will vary according to the platform. Monochrome screens display images in four shades of gray, while color displays produce resolutions ranging from 120 x 160 dots per inch to 800 x 600 dots per inch.
Higher resolutions translate into clearer images and are generally easier on the eyes.
Some also have jacks for headphones and earphones. Others can play MP3 files and other audio recordings. Almost all PDAs feature alarms . Many handheld PCs and palm-size PDAs allow you to send and receive email. However, what you see on the Web will be determined by the size of your screen.