The Smart Sock and Base Station connect via Bluetooth low energy. WiFi is only needed if you would like to use the app to view live readings and view them remotely. The Base Station is the primary notification system, so if your WiFi goes down or your phone dies (or you don’t have it at all), the Base Station is still designed to notify. While WiFi is not required, it does make for a better user experience. HotSpot WiFi is not recommended.
The Owlet Smart Sock 3 fits most children up to eighteen months old, or 30 lbs. The Owlet Smart Sock Plus and Smart Sock Extension Pack include fabric socks that fit children up to 5 years, or 55 lbs.
The Owlet Smart Sock comes with 3 fabric socks (size 1-3). Our socks are designed to fit babies to 18 months or from 6 to 25 pounds. Actual sizing and fit may vary as babies feet are all different shapes. It’s important to get a snug fit but to never put the sock on too tight.