The best monitor for sound in our tests is the Philips Avent SCD630, with a score of 8 of 10. This monitor has the best sound activation and background cancellation features in the group, and while the sound is bright, it is also clear without an echo. Most of the competition earned 4s and 5s for sound, with all of the Wi-Fi monitors only earning 4s. It seems that no matter how good your parent device might be, the Wi-Fi cameras struggle for the most part to transmit clear sound with good sound features.
Some audio/video monitors filter out "normal" sounds and motions. The receiver is supposed to turn on only when your baby makes an unusual motion or sound, such as crying or rolling over when he's waking up from a nap. This feature is designed to extend battery life, although the receiver should be docked for overnight monitoring to keep the battery charged. We haven't tested any models with this feature, so we don't know how well it works.
This unit only works until little ones can roll or crawl. It can be uncomfortable for some babies or ineffective if little ones are too small or their diapers don't fit well. We worry parents will rely on this kind of device to prevent SIDs and caution you that there is no evidence that it does or can prevent the incidence of SIDs. However, if you want to know when your little one is moving at a predictable rate, and knowing may help you sleep better, then the Snuza could be the right option for you that won't break the bank or require adjustments to your nursery.
Internet speed is a challenge with wifi cameras and wifi baby monitors: people want cameras with high definition video (720p or 1080p), but most internet connections are nowhere near fast enough to stream that high-quality video in real time. So parents get really frustrated with their HD wifi baby monitors because they find the video choppy, laggy, and unreliable. Most modern wifi cameras allow you to lower the resolution of the video so you can still see your baby, but not in high def.
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As you’d expect, the talk back functionality and audio quality in general are great—easily better than the crude talk back features on our video monitor picks. With the battery lasting about 19 hours on a full charge, this monitor had the strongest battery life of any in our test (not entirely a fair comparison, as this is the only one with no screen to power). Rated to a range of 1,000 feet, it exceeds the range of our pick (700 feet) both as advertised and in practice during tests.
Its parent display unit is the smallest we tested, with a screen only 2.4 inches wide, but the video quality was among the best. By comparison, Infant Optics’ bigger screen didn’t offer a better picture, and our Motorola model had an obvious two-second delay — even when we took it off WiFi and used its direct signal mode to rule out connectivity issues. The differences are slight, but we were impressed that the HelloBaby could keep up with monitors twice its price.
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.
You might prefer one that has lights as well as sound. All the audio monitors we rated had this feature. The Philips Avent DECT SCD510, which sells for about $120, has a series of small LED lights on the parent monitor. The louder the sound in your baby's room, the more lights go on, so you'll notice his crying even with the unit set on mute. Audio monitors are generally less expensive than audio/video models.