It may surprise you to hear that simply being able to last through the night, unplugged, with the display off, qualifies as exceptional battery life for a baby monitor. The Infant Optics was one of the only monitors in our testing that could easily do that, and then last a while longer the next day before needing a charge. (The manufacturer claims it lasts 10 hours with the display off—we got that amount of time off a full charge, even when checking the display intermittently.) This model also charges via a USB connection, which actually sets it apart from a variety of competitors, some of which use ineffective and inconvenient proprietary DC chargers or even disposable batteries.
Credit: NetgearCuteness aside, the Arlo Baby is compact enough to fit into even the most crowded nursery; a wall mount is included if you prefer that option. While you plug the camera in to power it, you can also detach the camera and move it into any room where an impromptu nap occurs, though we only saw three hours of battery life when we tried this out.
Parents love the ability to swap out the three available lenses. If you’re trying to keep track of an active toddler, use the wide-angle lenses to view the whole room. Try the normal or zoom lens when the camera is pointed at the crib to keep an eye on your sleeping baby. You can also change the camera’s viewing angle remotely from the parent unit.
Security is one reason Stanislav personally uses an RF monitor (like our pick) with his own daughter. He added that even that is not completely secure—“there are absolutely ways to break into a signal with radio frequency,” he said. But, noting that you have to be physically close to the house, and have the motive and ability to do it, he says it’s “a very small risk to your average parent.” In addition to the actual risks of a Wi-Fi monitor, there’s a perception that they’re vulnerable—this suspicious tone comes up often in many conversations with parents about monitors, with statements like “we’ve all heard the horror stories”2 coloring the whole discussion and suggesting, to us, that most people are really put off by the vulnerability.
Environmental sensors: Many monitors include the ability to set thresholds and upper limits for room temperature and/or humidity, and they'll alert you when these ranges are exceeded. While they can't control the temperature or the amount of moisture in the room's air, this feature can help you improve your child’s comfort, which will help them get more restful sleep.
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.