Features:1.0.66 inch OLED screen: With capacitive touch key, easy and convenient to operate2.Dual testing: Built-in highly sensitive chip, it can make blood oxygen and dynamic heart rate monitor and record the curve, so that you can know your movement situation better3.Sleep monitor: Record data about your sleep time, sleep quality, help you develop good rest habit4.Pedometer, Sedentary reminder: our private management expert, monitor the daily movement, record sports data, remind you to have a rest.5.Call / SMS reminder: When a call or message comes, the bracelet will remind you via vibration, never miss any important information6.Support fast charging and long standby time Specifications:Model: A88+Bluetooth version: V4.0Chip: Taiwan +Nordic 51822Waterproof rating: Ip67Working distance: Within 10mHealth tracker: Blood oxygen monitor(accuracy ± 1), heart rate monitor, pedometer, sleep management, distance calculation, calorie consumption, sedentary reminderOther functions: Call alert, message alerts, alarm reminderAlert type: VibrationScreen type: 0.66 inch OLED screenResolution: 64*28 pixelOperating method: Capacitive touch keyBattery type: Polymer batteryBattery Capacity: 100mAhCharging time: 4 hoursWorking time: 7 days, standby time: 30 daysCharging type: Contact type charging portCompacibility: Android 4.4 and above, iOS 8.0 and aboveApp Name: ylesmartApp Language: Chinese/EnglishAvailable color: Black, White, Blue, Green, PurpleBand material: ABS+SiliconeNotice:Blood Oxygen Monitor ,Hear Rate Monitor this function is get the date by the green led right , So it will easy affected by the condition ,so this can not compare with the medical equipment.This is just life waterproof , wash your face,watch your teeth, do not make it long time to contact with water.Package included :1 x A88+ Smart Bracelet1 x Charging Cable1 x English User Manual