Wellue O2Ring Oxygen Monitor with Vibration Reminder -Bluetooth O2 Pulse Oximeter Rechargeable, Continuous Recording of SpO2 & PR, Blood Oxygen Saturation Tracker with Free APP & PC Reports Blacklonia The flat bottom also makes

The flat bottom also makes it stable on a flat surface

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Dual Silicone Anti Slip Zone provides an elite athletic Grip so you won't have to readjust your sleeve during Yoga

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Wellue O2Ring Oxygen Monitor with Vibration Reminder -Bluetooth O2 Pulse Oximeter Rechargeable, Continuous Recording of SpO2 & PR, Blood Oxygen Saturation Tracker with Free APP & PC Reports Blacklonia The flat bottom also makesBrand: Wellue Features: All day Monitoring: It can be used continuously tracking of blood oxygen level, pulse rate and body motion for the whole day. (Up to 16 hours). Smart Readings Reminder: If the O2 level is lower than the preset threshold and heart rate is lower or higher than the preset threshold, the device and the APP will vibrate and mark it in the report. Detailed APP & PC Reports: Free APP & PC software provides graphic O2, PR report and