The award-winning Smart Sock goes beyond the capabilities of any other baby monitor to tell you the things that really matter, when it really matters. The Smart Sock is the first baby monitor to track your baby's oxygen level and heart rate—the best indication of your baby's health—through gentle motion, while they sleep. If your baby's readings leave pre-set safe zones, you'll receive a notification that lets you know your baby really needs you. This all-new Smart Sock is the third of its kind and it's smarter than ever, offering new hardware and design, live readings more often for extra peace of mind, and wireless charging on the handy drop-and-go base station.