0.66 inch OLED screen: With capacitive touch key, easy and convenient to operate 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 betterSleep monitor: Record data about your sleep time, sleep quality, help you develop good rest habitPedometer, Sedentary reminder: our private management expert, monitor the daily movement, record sports data, remind you to have a rest.Call / SMS reminder: When a call or message comes, the bracelet will remind you via vibration, never miss any important informationSupport fast charging and long standby timeSpecifications:Bluetooth version: V4.0Waterproof 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 pixelBattery type: Polymer batteryBattery Capacity: 100mAhCharging time: 4 hoursWorking time: 7 days, standby time: 30 daysCompacibility: Android 4.4 and above, iOS 8.0 and aboveApp Name: ylesmartBand material: ABS+Silicone