Do you want to know if there are hypoxia events during the night? O2Ring makes it possible. Comfortable overnight monitoring with silent vibration alarm for low oxygen, high or low heart rate. Share professional oximetry reports in Mac, PC & mobile device. Convenient & Accurate: O2Ring oxygen saturation monitor uses the same transmissive oximetry technology trusted by hospitals and clinics. Medical-grade ring give you best wearable experience and without suppression, totally free your finger! Note: The smaller the movement, the better for the measurement accuracy. Sleep Better Now: O2Ring sleep oxygen monitor with the intelligent silent vibration alarm. No worry to ignore any hypoxic events or abnormal heart rate, built-in vibrator will vibrate and notify you when oxygen level is lower than your preset threshold, or when your heart rate is too high or too low. Intuitive PC & App Report: it reveals health insights. The O2Ring blood oxygen saturation monitor is always your powerful database. Detailed analysis and trends of your nightly blood oxygen levels, heart rate and body movements during sleep. High-resolution trend chart with 4-second interval. Tells you how long your oxygen is below 90%, how often O2 drops above 4% throughout the night. Zoom out the trend chart to see more detailed information, even the exact value when it happens. You Will Get: 12 months worry-free warranty, lifetime technical support, first-class customer service with quick response within 12 hours. Note: Excessive movement, strong light and use with cold fingers may affect the measurement of the device. If there is any problem with the device, kindly consult the instructions for use and/or contact the seller for solution.