From Owlet, this sock features: Dream Sock® is the first-of-its-kind FDA-Cleared smart baby monitor to offer Live Health Readings and Health Notifications For use with healthy infants between 1-18 months, 6-30 lbs. Track Baby’s pulse rate, oxygen, wakings, and sleep trends in real-time via the Owlet Dream App View Baby’s historical health readings & trends in the app to gain valuable insights Clinically proven to offer medical-grade accuracy, even through gentle motion, across all skin tones Eligible for purchase with HSA/FSA funds Note for setup: Owlet device and phone or tablet need to be connected to 2.4 GHz. After setup, you may move your phone or tablet back to 5 GHz Imported.