DFit D21 Smart bracelet Heart Rate Monitor Smart Band Bracelet Fitness Tracker Sport Pedometer Wristband for Android iOS|Smart Wristbands| - AliExpress
DFIT D21 WATCH INSTRUCTION | ManualsLib
DFit D21 Smart bracelet Heart Rate Monitor Smart Band Bracelet Fitness Tracker Sport Pedometer Wristband for Android iOS|Smart Wristbands| - AliExpress
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