The audio quality is excellent, thanks to VTech's use of DECT 6.0, so you shouldn't hear any interference, static, or echoing when you listen in on your baby. Since the monitor uses a special frequency to relay the signal from the monitor in your baby's room to the parental unit, everything is encrypted and secure. No one but you will hear your baby.
Motion and audio sensors: In the old days, parents were forced to endure a consistent ambient hiss from their audio monitors while they listened for their child’s stirrings or cries. Mercifully, many modern baby monitors will stay in “quiet mode” until they detect motion and/or sound, which will trigger an alert, such as activating the handheld video display or pushing a notification to your smartphone.
Compared with competitors, the Infant Optics DXR-8 has a more intuitive, easier to use interface, and the battery life on its parent unit (aka the monitor) lasted longer than on any other video option we found. On other requirements, it delivered as well as the best monitors we tried: It has an adequate range for home use, acceptable image quality, an ability to add on multiple cameras, and overall simplicity and ease of use with a minimum of annoying quirks. Most of its specific flaws concern battery life and charging, but this is a common problem among baby monitors, and the company has a good record of responding to customer service issues.
Gone are the days of silently peeking into the nursery to check on your napping baby and then, whoops, accidentally waking them up (“No, no, please no!”). A baby monitor uses a camera to watch over the crib, while you carry a handheld device that lets you know what’s going on with your child at any given moment, no matter where you are in your home. There are also other monitors that track sleep or breathing either with a clip or sock.