YTFU M3 Smart Fitness Tracker,Waterproof Activity Tracker with Color Screen,Fitness Wristband with Blood Pressure Heart… Price: $8,69 (as of 25/10/2021 10:58 PST- Details) & FREE Shipping.

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WATERPROOF DESIGN – The M3 Smart Fitness Tracker is Waterproof IP67 level,that allows you to swim in the water and run in the rain.
M3 SMART TRACKER – This M3 Activity Tracker with Heart rate monitor adopts the latest HR sensor to track your heart rate continuously and automatically.With dynamic and static heart rate, blood pressure, blood oxygen fatigue and fatigue monitoring function.