Owlet Smart Sock 3

Both the Smart Sock 3 and the Baby Monitor Duo 3 are excellent choices for monitoring your baby, as they both come with built-in cameras and IR illumination for night vision. They also both use sound sensors to keep track of your baby's well-being. However, the Smart Sock 3 is focused on tracking your baby's vital signs through a sock that they wear, while the Baby Monitor Duo 3 offers additional features such as temperature and humidity sensors for a more comprehensive monitoring experience.