With the Owlet Dream sock bedtime blue OW-DS-BL you can keep an eye on your baby's health. You place the sock around your child's foot. The sock measures different things during sleep. In this way, it measures the heartbeat, oxygen levels and sleep trends. You connect the sock to the smartphone app. Here you can see all the information about your child. You receive a notification on the base station and in the app if something is wrong. The sock is suitable for children from 0 to 18 months. Thanks to the adjustable size, you can easily adjust the sock to fit your child's foot. You will receive 2 right and 2 left socks.