Frequency: Some baby monitors operate on the same 2.4GHz frequency band as household products like microwaves, cordless phones, wireless speakers, and so on. When the monitor is on the same frequency as a number of other products, you can experience interference and static. You may want to get a monitor that uses a different frequency like 1.9GHz, which the Federal Communications Commission sets aside for audio-only applications. It's called DECT, or Digitally Enhanced Cordless Telecommunications.
But not all of the tech has been figured out just yet. Namely, the spectrum of video quality between makes and models is massive. Overall video quality ranged from murky postage stamp, to crisp, HD signals—even on models that cost more than $200 and were filming in daylight! At night, almost every camera we tested used infrared bulbs (light that’s bright to cameras, but invisible to the naked eye). Paradoxically, because of those powerful LEDs, you often get a better picture quality by setting a camera to night mode during the day—especially in a shadowy room kept dark for a napping baby.
The main reason you’re going to need a baby monitor is to answer a simple, but time-honored, question: Why the hell is my baby crying? It’s only been in the last 30 years or so that parents have relied on the remote surveillance of their sleeping children. For the eons before that, it was a combination of natural, ear-piercing cries, and sleeping in the same yurt.
Below we list our top 5 baby monitor results, some of which are self-contained units, whereas some use wifi and your smart phone. Then we detail our in-depth reviews. After our buying guide, at the end of the article you can find more details about how we evaluated each model. Note that if you're looking for a sound-only baby monitor (an audio baby monitor), click here.