I bought my son for 10 years, but they turned out to be too big for him, I left it for myself, in general I wear it for the 3rd week, in general, as a watch with vibration suits
Has pros:
autonomy, if you turn off everything superfluous, then more than 2 weeks is easy.
the display is bright and juicy, even 40% is enough, the vibration is also good, the pulse measures approximately accurately, there is a timer, it is convenient to set alarms right in the clock without a smartphone, the water protSee full review