Imprecise and uselessDon't buy it
Imprecise and uselessDon't buy it! It's very imprecise, pressure and other values are not even close to the real values measured with professional instruments. The menus of the software are not completely translated, and many items remains in chinese. The interface is not very friendly, the navigation wheel is imprecise. I don't think it is worth the price at all. Furthermore is very difficult to have explanations about the return policy, the answers are given with big delay (days). At the end the return can be done but the refund will be deducted of 30 $ which is the value I would pay wor this watch. Very negative experience.