Slightly used Owlet Smart Baby Monitor. Peace of Mind: Dream Sock provides caregivers with a deeper understanding of their infant’s safety and well-being through real-time health readings and timely notifications when their baby needs their attention FDA-Cleared: Dream Sock is the first and only FDA-Cleared smart baby monitor and is intended for use with healthy infants between 1-18 months, 6-30 lbs. Track Live Pulse Rate & Oxygen: View and track your baby’s pulse rate, oxygen, wakings, and sleep trends from anywhere and in real-time via the Owlet Dream App. Know When You’re Needed: If your infant’s health readings fall outside the preset ranges, you’ll be notified in real-time through lights and sounds on the included Base Station as well as in-app notifications.