Languagesenglish capacity mah100 materialabs silicone connectionnfc bluetooth40 typesmart bracelet featuresdistance tracking long standby pedometers calories burned find my device heart rate monitor information sleep tracker wearable water resistant water proof sports health care multifunction sensorheart rate sensor accelerometer proximity sensor gravity sensor supported operation systemandroid ios screen typedisplay technologyoled rammb128 rommb64 stand by time