With a memory of up to 40 hours the EMAY Bluetooth Oxygen Monitor allows you to record continuous blood oxygen & heart rate during sleep or other occasions.

Free iOS/Android app for reviewing your historical data (second by second), and providing professional blood oxygen & heart rate trend reports to share with others.

Record First, Upload Later! Does not require real-time connection to the app. Wear it to record, take it off to sync.

Accurate & Reliable: Accurately determine your blood oxygen and pulse rate. Display it on a large and rotating digital LCD display. You do not need to twist your neck trying to see it.

Note: Strong movement & direct sunlight will affect the accuracy of readings. Please stop the exercising for 10 seconds and avoid direct sunlight before measuring or tracking your oxygen.