Smart Watch Fitness Tracker Activity Tracker with Bluetooth Call Heart Rate Monitor Blood Pressure Sleep Monoitor SMS Notifoictions IP68 Life Waterproof for Android iOS Phones

I had to return a previous DaFit watch as it didn't work. Mistakenly, I bought this one, not realizing it was the same company. I don't understand all the glowing reviews. When I read them, I thought this is what I wanted. When I fully charge it,, the screen worked fine, but when I tried to change modes it went to "sleep" tracking and would go no further. Continued tapping finally got me to other modes, but when I went to heart monitor, or blood pressure, the screen went blank in seconds. Does not work. I won't be fooled into buying another "Dafit" product again. The only god it has done was give me the time.