Languagesenglish capacity mah85 materialsilicone connectivitynfc bluetooth40 fitness wellnessexercise reminder sedentary reminder alarm clock find my device stopwatch sleep tracker activity tracker cpunrf51822 charging timeh18 typesmart bracelet featurescamera control message control touch screen sports distance tracking long standby pedometers calories burned heart rate monitor anti lost modelyyd21 sensorfinger sensor heart rate sensor gyro sensor proximity sensor gr