Owlet Smart Sock V3 Monitor, Mint

Track heart rate and oxygen with proven pulse oximetry technology. The device helps you measure sleep trends - view total hours slept, number of wakings, sleep quality, and more. Fits babies 0 to 18 months - fabric sock fits 5lbs to 30lbs, for both left and right feet. The smart sock comfortably wrap around the baby's foot and connect to a base station up to 100 ft away.

The battery lasts 16 hours. You can get 8 hours battery life in 20 minutes and a full charge in 90 minutes. In addition, wireless charging is enabled via a convenient drop-and-go on the base station.