1.75 inches and a weight of only 40 grams, I thought with all the functions enabled, the battery would last a maximum of 3 days, but here it turns out to be 6-7 days, and if everything is turned off, then it lasts 10 days. I measure the pulse when necessary, the readings are accurate. The vibration is pleasant, I often put the phone on silent and focus purely on the clock, it’s very important when I’m sitting in headphones at work. IP68 protection, I haven’t swam with them yet, but I don’t take See full review