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