Languagessimplified chinese english capacity mah70 materialsilicone sim card typeno sim card slot connectivitybluetooth41 bluetooth 42 bluetooth40 fitness wellnessexercise reminder sedentary reminder sleep tracker cpunrf51822 charging timeh4 waterproof levelipx 4 brandoukitel typesmart bracelet featuresinformation touch screen pedometers calories burned heart rate monitor anti lost modela19 sensorfinger sensor heart rate sensor gravity sensor supported operati