Owlet Monitor Duo 2 seamlessly pairs the Owlet Smart Sock 3 with Cam 2 for a complete picture of your baby’s well-being. The Monitor Duo 2 tracks heart rate, oxygen level, and sleep trends while streaming HD video all in one place. Monitor what matters most and be notified when readings fall outside of your baby’s preset zones. Sound, motion, and now cry detection, helps let parents know what happened, with the ability to also watch video clips of sounds or movement.