What are the features of NO.1 F4 Smartband?

What are the features of NO.1 F4? How to connect the app" FunDO"? Such as sync the sms, calling, sports data, sleep data and so on. More details about NO.1 F4, you can learn more from here: http://en.001phone.cn/no-1-f4-ip68-waterproof-smartband-bracelet-html ——————————————————————————————————md

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