"For 2 or more children this is fantastic! You can pair multiple cameras and set the monitor to scan back and forth viewing multiple rooms. The lens change feature is also nice (a zoom lens...included) allows you to get a close view of the crib/swing/etc even if the camera has to sit far away. The (wide angle lens.... optional purchase) allows you to view most of the bedroom. This is great for older kids rooms so you can see if they get out of bed and what they are doing… Long-lasting battery provides reliable charge: 10 hours in power-saving mode, 6 hours with the display screen constantly on."
The most important thing to look for in all kinds of baby monitors is audio quality. Regardless of whether you want a video-based baby monitor or not, you need clear audio so you can hear your baby properly. You'll also want one with sound activation so that you don't have to listen to white noise 90% of the time. With sound activation, you'll only hear the noises from your baby's room when there's something important to hear.
Many audio/video monitors feature infrared light or "night vision" so you can see your baby on the monitor even when she's sleeping in a dark room. And some audio models feature a night light on the nursery unit that you can activate from the receiver. Other features may include adjustable brightness, and the ability to let you activate music or nature sounds to soothe your little sleeper by remote.
It really depends on what you feel most comfortable with. There are audio monitors that allow you to listen to any noise coming from the nursery, vital monitors that track sleep and breathing and video monitors that add sight to sound. Babylist parents overwhelmingly choose video monitors. The security of seeing what your child is up to—like if they’ve gotten tangled in their swaddle, pulled their diaper off or climbed out of the crib—can be worth the extra cost of a video monitor.