useless junk, nothing is accurate. BPM, PPG, step count. no relation with actual measures.
I have only two problems with the product: 1) it would be nice to have more than 2 themes for main screen 2) the oled sreen's intensity is very poor, even in the high intensity mode. i can see almost nothing on the screen in ourdoor. The product is good anyway, every function i working well.