This smart sock uses oximetry to monitor your baby

The Owlet Baby Monitor uses two pieces to monitor your child's vitals: a smart sock and this base station.

The base station tells you what the sock is reading by flashing colored lights and setting off alarms. You can turn them off by pressing the top of the hub.

The sock plugs into the hub to charge, and fits onto your child's foot comfortably. The iOS- and Android-compatible app walks you through the process with an included video.

Owlet comes with different sock sizes so you can use the monitor as your child grows. The fabric is soft and stays on your child's foot surprisingly well, even when they're kicking.

The home screen of the app just tells you whether your child's vitals are normal. From here you can turn the sock on and off.

When you swipe up in the app, you can see your child's heart rate and oxygen levels. It also shows the upper and lower limits for each of those readings.

On the hub, you can see whether the sock is losing connection. You can also personalize whether it will set off an alarm in case of a disconnection.

The hub also connects to Wi-Fi, so when you're out of the house, you can still get updates from the app.

Owlet offers some cool features that competitors don't. Whether they're worth the $250 price tag or not is up to consumers.