smart watch men ecg+ppg heart rate ip68 waterproof bluetooth call smartwatch for huawei xiaomi samsung watch

1, wearable devices monitor human activities through electronic sensors. they are at the level of consumer electronics. it's normal to have certain deviation. the health test results of the watch are for reference only, and can not be compared with medical equipment. when the watch is placed on the surface of the object, there will be heart rate / blood pressure and other test results. it is normal and not a product defect