Sleep more and worry less, for longer. The Owlet Smart Sock Plus allows you to safely track your child’s heart rate and oxygen while they sleep, from birth to 5 years. If your child’s reading leaves preset zones, you’ll receive a notification that lets you know your child really needs you. Track your child’s reading from anywhere, and review history and sleep trends in the Owlet App with tailored monitoring technology that adjusts as your child grows. Now you can feel more confidence, more freedom and more peace of mind knowing that Owlet is here to help you keep your child safe as they grow and develop. Features: Track heart rate and oxygen with proven pulse oximetry technology Measures sleep trends - view total hours slept, number of wakings, sleep quality and more Fits children 5 - 55lbs (2.2 - 25kg), 0-5 Yrs, for both left and right feet 16-hour battery - get 8 hours in 20 mins and a full charge in 90 mins Wireless charging via a convenient drop-and-go on the Base Station The Smart Sock comfortably wraps around the baby’s foot and connects to a base station up to 30m away Tells you when Baby needs you. Base Station and Owlet app notify you when readings leave ‘safe’ zones What’s in the Box:Smart Sock SensorFabric Scoks, 3 left & 3 rightBase StationCharging CordsPower Adaptor Specifications: Dimensions: H:9.0 x W:7.0 x D:10.0 cm Colour: Mint Guarantee:1 year Model Number: OWSP-MT Self Assembly Required: Yes