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The circul+ ring helps improve your personal health and wellbeing by providing 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. Prevention 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. Prevention 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. Prevention circul+ ring and circul+ mobile app includes a free cloud portal and dashboard for PC viewing printing and downloading your data! Coming soon to the Prevention circul+ ring thru a simple free firmware upgrade via the circul+ mobile app is single lead ECG electrocardiogram of your heart rhythm HRV heart rate variability and Blood Pressure.