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Operation System Requirement: Android 4.3 OS, IOS 7.0 or above.
According to their own mobile phone scan QR code, download the corresponding APP, via Bluetooth connect to E02 bracelets, to monitor their sleep, movement data.
Waterproof level P67: swimming also can monitor your exercise.
OLED display screen, easy to operate, Bluetooth self-shots.
Strap is TPU material, fashion and good for your feeling.