Wireless systems use radio frequencies that are designated by governments for unlicensed use. For example, in North America frequencies near 49 MHz, 902 MHz or 2.4 GHz are available. While these frequencies are not assigned to powerful television or radio broadcasting transmitters, interference from other wireless devices such as cordless telephones, wireless toys, computer wireless networks, radar, Smart Power Meters and microwave ovens is possible.
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.
The interface on the monitor, aka the parent unit, is basic, simple, and intuitive, while many of its competitors have awkward controls. When panning and tilting the camera, for example, the Infant Optics responds immediately and can move in very small increments. The text on the menu displays look like something off an old Motorola RAZR, but the commands are easy to interpret and less confusing than those of some competitors. A group of four buttons makes it easy to pull up the menu and make a change (to the volume, say) without losing sight of the image on the screen. Other nice minor touches, like a display that constantly notes the temperature in the baby’s room, appear on this model but not on all of its competitors. This is not a touchscreen, but frankly, if you’ve ever used an iPhone, you’ll find the touchscreens on most baby monitors to be sorely substandard.
We were also disappointed that the Angelcare’s parent unit lacks an out-of-range warning. If you’re in the backyard or basement and the monitor disconnects, it’s not clear whether you’re looking at a napping baby or a frozen screen. Still, it beat out the Baby Delight for sound and video quality and offers a few customizable features: You can adjust the volume on the baby unit as well as the parent unit, and set up timed alarms and temperature alerts.
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.