Eufy Baby Smart Sock S320

**Used Once** Basically brand new baby smart sock Box included! Heart rate and blood oxygen, updated to your phone in real time Sleep patterns and naps, with daily reports and adjustable sensitivity Alerts when vitals changed, when your baby cried, or when the sock slipped off A washable fit for babies 0 to 18 months, in three sizes that grew with your little one Around 24 hours of battery and no subscription fee The draw was that you could rest a bit easier at night, knowing the numbers were being tracked even when you weren't standing over the crib.