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This is a small and delicate smart heart rate watch. Compared with many bulky and bulky watches, pt99ht is very delicate. At the same time, it also introduces a number of advanced explosion-proof designs. The strap can withstand the high-strength tensile test. The main body of the watch has passed the hammering explosion-proof test. The overall water-proof design, hand washing, rainwater and bathing are all in the same place Rate watch gives people with great self-esteem protection, but also plays a practical monitoring role.