Languagesenglish capacity mah50 materialsilicone connectivitybluetooth40 fitness wellnessactivity tracker exercise reminder sedentary reminder find my device sleep tracker cpunrf51822 charging timeh18 typesmart bracelet featurespedometers calories burned heart rate monitor anti lost camera control message control touch screen sports distance tracking long standby modelyyid115 sensorgyro sensor proximity sensor gravity sensor finger sensor supported operation systemi