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 t