Review on Black Jiandi 2-in-1 Smart Watch with Heart Rate Monitor, SPO2 Blood Oxygen Monitor Chest Strap, Fitness Tracker with Blood Pressure Wrist Band, HRV Health Sleep, Calorie Counter and Activity Tracker by Alex Gilbert

Heart Rate and Blood Oxygen are pretty accurate. Everything else is just a joke. Don't trust the information this thing gives. The EKG results are not even close to reality. It's a waste or money. Take the one Revain made. He's sticking to what he knows, I should've just kept mine. It was cheaper too