I looked at the specification of this watch and the feedback on Walmart was not sure if I should order the watch, but I thought for 39 us dollars it is ok to give it a go. I was surprised to see the quality of the watch as my first impression, then I charged the watch before use (full charge for couple of hours, jut to make sure it is fully charged). I started using the watch after downloading the App (Hero III) and the App found the watch and connected without any input from my side (Great). Then, I started measurements of BP, Spo2, Pulse and compared to my hi quality blood pressure monitor and found the followings: Pulse measurement from the watch is about 99% to 100% of the Good BP Monitor, the blood pressure measurements from the watch is 75% to 80% of the real value from a good BPM (multiply 1.2 to 1.3 of what you read from the watch to get to real value, this is for SYS and DIA measurement). Interesting discovery is that you will get the same BP readings regardless where your rest is positioned with respect to your heart. The SpO2 values are very close to a professional "Nonin monitor" I have ($600) about 98-99 %.The battery life is outstanding, it took one week to recharge the watch after heavy use for a full 7 days :)The sleep monitor is good too, I am not sure how to adjust the sleeping time (when to start and when to end the sleeping period.I would love to see update to their software to add a correction factor to the BPM so basically to calibrate the reading of the watch to a real good BP monitor.All in all, it is a good watch with real glass dial and good armband. The App is good and stable and useable.
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