Blood oxygen saturation (SpO2) is an essential physiological parameter of the respiratory cycle of the human body. Check your body at any time.
Precise Sony GPS
Sony low-power GPS module can accurately locate movement track, and the GPS can work continuously for 21 hours.
5 ATM Water-resistance
Haylou RS3 Smart Watch is rated waterproof to 5 ATM with a metal frame and integral molding back shell design.
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