Monitor your baby's heart rate and oxygen levels with the Owlet Smart Sock 3. The best baby purchase!! You can use as is or convert to Dream Sock (current version). Set includes all original products. Socks are in fair condition. https://support.owletcare.com/hc/en-us/articles/4421509101581-Dream-Sock-Conversion-USA-Canada-Only#:~:text=The%20Smart%20Sock%203%20will,your%20sock%20complete%20the%20flow.