Owlet Smart Sock Plus - Baby Monitor - Track Heart Rate, Oxygen and Sleep Trends (0-5 years) - Mint Green : Amazon.co.uk: Baby Products
Owlet® Dream Sock
Amazon.com: Owlet Dream Sock - Smart Baby Monitor - Foot Sensor to Track Heartbeat and Oxygen O2 Levels in Infants and Babies - Notifications for Night Wakings, Movement and Sleep State -