A lot can happen while your baby sleeps, but a traditional baby monitor can only tell you so much. The Owlet Monitor Duo Smart Sock 3 + Cam 2 goes beyond the capabilities of any other baby monitor for the most complete picture of your baby’s wellness while they sleep.This Duo offers the intelligence of our award-winning Smart Sock 3 paired with the Owlet Cam 2. Track the most important indicators of your baby’s health-like oxygen level and heart rate - and receive a notification if your baby’s readings preset “safe” zones. See and hear your baby clearly through a secure, encrypted connection directly on your smartphone from anywhere.•Tracks heart rate and oxygen using proven pulse oximetry technology•Measures sleep trends - view total hours slept, number of wakings, sleep quality and more•Fits babies 0-18 months - fabric sock fits 5lbs - 30lbs, for both left and right feet•16-hour battery - get 8 hours in 20 mins and a full charge•in 90