Languagesenglish capacity mah65 materialsilicone connectivitybluetooth40 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 anti lost camera control modelyytlw04tw04 sensorfinger sensor gyro sensor proximity sensor gravity sensor supported operation systemiphone android