Lunasea Wireless SpO2 Pulse Oximeter Sleep Monitor with Vibration Alarm HRV Heart Rate Monitor Smart Fitness Tracker with APP

The Most Important Information? 1,Customers think that O2 sensor stays the same as 98%,We suggest our customers to watch the screen for 1 minute; Here is the video to prove data that is accuracy.Please Search keyword of V09 contrast life monitor on YouTube to check. 2,The O2 data will sent to APP or update to APP at PM 24:00-AM 7:00. Please do the following step: Open setting-DeviceV90s-Switch ...