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By certification 
* Bluetooth 4.0 wireless transmission;
* Steps walked: keep record every 10 minute;
* Sleep mode
* Fatigue reminder
* Alarm function:Set up by APP
* Data storage for 7 days;
* Low power reminding;
* 5 LED indicator show power quantity;
* Steps walked: keep record every 10 minute;
* Sleep mode
* Fatigue reminder
* Alarm function:Set up by APP
* Data storage for 7 days;
* Low power reminding;
* 5 LED indicator show power quantity;
