Imagine keeping a close eye on your little one without constantly peeking into the nursery. The eufy S320 Baby Smart Sock does just that. This clever baby monitor wraps comfortably around your baby's foot, tracking their heart rate and oxygen levels while they sleep. It sends real time updates to your phone, so you can relax knowing your baby is safe and sound. The sock connects to a base station that glows green when everything's okay, giving you peace of mind at a glance. With its soft, breathable fabric, it's comfy for your baby and easy for you to use. The eufy S320 helps you get some much needed rest while still being there for your little one. It's like having an extra set of eyes and ears in the nursery. The manufacturer's part number for this smart sock is E8340C21.