After F3 Smartwatch, No.1 is going to release F4 Smartband model, this is IP68 waterproof and it includes Multi Sport Mode: you can choose Basketball mode, badminton mode, mountaineering mode, swimming mode etc. in corresponding mode, would tracking corresponding heart rate, Pedometer, Calories, Sport time etc. make your sport more science and health.
No. 1 F4 has blood pressure and blood oxygen function, those health tracking, make it more useful. In addition to, F4 have changeable, 2 color mix straps. More about F4 smartband contains in below video.
No.1 F4 official website here.
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