The Owlet Baby Monitor Duo 2 combines Smart Sock 3 with the Cam 2 for the most complete picture of your baby's well-being. Track your child's heart rate, oxygen level, and sleep trends, while streaming live HD video to your phone. View your child's readings in real time, from anywhere, in our free App and receive notifications if readings leave preset zones, and sound and motion notifications to stay informed of your child's needs. The Smart Baby Monitoring - Monitor your baby's heart rate and oxygen level while streaming live audio and HD video.