The award-winning Owlet Smart Sock tracks the most important indicators of your baby’s well-being so while they rest easy, you can too. Monitor your baby’s wellbeing while they sleep with the award-winning Owlet Smart Sock 3. Trusted by millions of parents around the world, the Smart Sock 3 tracks your baby’s oxygen levels and heart rate readings with proven pulse oximetry technology that goes beyond the capabilities of any other baby monitor. The Owlet Smart Sock 3 will immediately send alerts to the Base Station and Owlet App if readings leave pre-set safe zones, so that you know when baby really needs you. The free Owlet App also allows you to receive insights with the sleep history feature which can be used to create new routines as your baby grows Tracks Heart Rate and Oxygen View your baby’s live readings in the Owlet App anytime, anywhere. Stay informed of your child’s well-being while they sleep. Lets You Know When They Need You Get immediate notifications if Baby’s oxygen level is too low or heart rate is too high. Know when your little one needs your attention. Measures Sleep Trends View total hours slept, number of wakings, and overall sleep quality. Use the data to create new routines and improve your baby’s quality of sleep as they continue to grow. Depth: 85 MM Height: 145 MM Material Content: plastic, fabric Width: 205 MM Uses accurate and proven pulse-oximetry technology to monitor baby’s oxygen level and heart rate while they sleep. Battery life: 16 hours (get 8 hours in 20 mins or a full charge in 90 mins) Quick drop-and-go wireless charging on Base Station. Base Station glows green when readings are normal and flashes red light and plays sounds when readings leave pre-set zones. Get notifications on your phone in real time by using the free Owlet App. Owlet App tracks sleep history, sleep trends, heart rate, and oxygen levels. The Smart Sock works with the Base Station in the event of Wi-Fi disruption. Comfortably wraps around baby’s foot and can connect to a base station up to 100ft away. Suitable age: 0-18 months (2.2kg to 13.6kg) Includes two sizes of socks for growing feet: Size 1 fits babies up to 12lbs, Size 2 is for babies from 12-30lbs.