S21wristband heart rate monitor ip67 waterproof smartband activity tracker bracelet for android ios phone
Languagesenglish materialtpu connectionbluetooth40 typeactivity tracker smartwatch smart bracelet featurestimer heart rate monitor sleep tracker water resistant water proof information wearable sports exercise record pedometers calories burned alarm clock models21 sensorheart rate sensor supported operation systemandroid ios screen typedisplay technologyamoled listing date04112017
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