You might see monitors on the market with claims that they can track a baby's breathing or movements, but unless the unit is registered with the FDA, it's not a medical device. Consumer Reports hasn't tested this type of monitor. Talk with your pediatrician if you think your child has a condition that warrants medical monitoring. He or she can give you advice on the best devices.
With several dozen reviews posted online, the Safety 1st HD WiFi Streaming Baby Monitor has a 4.0-star rating on Amazon. One satisfied owner speaks for many when he calls the "picture quality excellent," the night vision "clear" and "so well illuminated," and the sound quality so good that you can "hear everything going on in crisp and clear" detail."
Beyond security, Wi-Fi monitors have other disadvantages. In our tests, connectivity was more of an issue with Wi-Fi monitors than it was with RF monitors. We tested our Wi-Fi monitors on two separate routers and consistently had problems—we’d often lose the connection some time in the night and not even realize that the monitor had disconnected until morning. This happened with all three Wi-Fi models we tested. We never really felt confident relying on any of the connected monitors overnight, despite the fact that the modem and router were literally on the other side of a wall from the monitor. Other owners (like this one) have had the same issues.
The Motorola MBP33S is a digital video monitor with a multi-view feature that lets you incorporate additional cameras, so you can keep an eye on your baby in up to four rooms. Its large wireless range stays connected for nearly 600 feet, and the two-way communication helps you soothe your little one from the next room. Plus, the monitor displays temperature, so you can make sure your baby is never too cold or too hot.
Encrypted Wireless Communications: Here's something creepy and strange - there are reports of people tapping into even the best baby monitors and getting some bizarre pleasure from watching your baby sleep or watching you feed the baby in the middle of the night. A few of the manufacturers have included wireless encryption on their systems to make this much less likely.
With the VTech VM342-2 Camera Video Monitor's 170-degree wide-angle lens, parents can use multiple viewing options to get a panoramic view of their baby's nursery. This high-resolution LCD monitor also has automatic infrared night vision to check on babies without waking them. Plus, it has four calming sounds and five lullabies to help babies get to sleep on their own.