I bought for myself. The main criterion is autonomy. 5 points. They have been working for almost a month, but without monitoring the pulse. The screen isn't electronic, not mechanical. Step accuracy is 4.5, compared with five xiaomi mi bands and amazfit bip-ops. For me, it's the most realistic. A lot of different workouts, but I adjusted it for myself. Insufficient measurement of oxygen in the blood. And so, the purchase is 4.9 on a five-point scale. I recommend
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