Brand New never been opened! Paid over $300. Jus a few details of what the sock does are "track how long and how well your baby sleeps, use sleep data and expect tips to adjust baby's routine, view live readings, trends, and toys in the owlet dream app. Tracks your baby's sleep trends, drop and go wireless charging base. Tracks sleep quality & trends, real time sleep notifications, weekly developmental tips. Monitors your babies heart rate and oxygen levels, and much more. Well with it.