Languagesenglish capacity mah86 materialsilicone connectivitynfc bluetooth40 fitness wellnessexercise reminder sedentary reminder find my device sleep tracker activity tracker cpunrf51822 charging timeh18 typesmart bracelet featuresmessage control touch screen sports distance tracking long standby pedometers calories burned heart rate monitor anti lost camera control modelyyh30 sensorfinger sensor heart rate sensor gyro sensor proximity sensor gravity sensor supporte