Languagesenglish capacity mah50 materialsilicone connectivitybluetooth40 fitness wellnessexercise reminder sedentary reminder find my device 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 modelyyid115 sensorfinger sensor gyro sensor proximity sensor gravity sensor supported operation systemi