The circul+ Smart Ring is the only ring oximeter with continuous blood oxygenation (SpO2) and Heart Rate (HR) tracking for sleep, activity, and overall wellness. Circul+ helps improve your personal health and wellbeing by providing exercise and sleep quality metrics that can enhance mental clarity and energy levels. Effective daily care metrics for heart and lung health including heart rate monitoring, steps and continuous SpO2 monitoring. circul+ enables comprehensive sleep tracking of your sleep stages (REM, awake, light and deep), SpO2 (blood oxygen) and heart rate for up to 12 hours per night. circul+ is the only ring pulse oximeter that also track your baseline skin temperature for 12 hours during sleep. Not only for sleep, the circul+ also continuously monitors heart rate, steps and calories burned during daytime. circul+ ring and circul+ mobile app includes a free cloud portal and dashboard for PC viewing, printing and downloading your data! circul+ provides next level accuracy and health metrics.