Blood Oxygen Measurement: Professional biosensing chip for measuring blood oxygen saturation SpO2, which makes blood oxygen measurement more accurate. With time interval setting and automatic monitoring of blood oxygen at that time. You can keep track of detailed data in the app and monitor your health over time. Sleep Monitoring: Monitors sleep quality and heart rate in real time and monitors your sleep breathing quality. Evaluates and assesses your sleep (sleep duration, wake-up times, sleep times, light sleep, deep sleep), rates sleep quality, and helps you have healthy sleep habits. Multiple monitoring functions: Monitoring of body temperature, respiratory rate, blood pressure, heart rate and pedometer. Notifications - You Don't Miss a Thing: Displays incoming calls, text messages, chat notifications, and other app notifications. You'll never miss any important messages. Long battery life: The built-in battery has a large capacity and an intelligent power consumption algorithm to optimize the use of battery capacity. In typical use, one upload lasts up to 15 days. Multiple sport modes: The sports watch supports several training modes, it records your time and heart rate during the exercise based on the respective training type and measures your calorie consumption. Keep track remotely: If your elderly parents use the watch, for example, you can keep track of their activities and health data such as calories, sleep, heart rate, blood pressure, etc. remotely, easily and conveniently on your mobile. Just add additional users to the app.  Specifications: Color: Black Size: 265x37x13 mm Shell: Vacuum-plated zinc alloy Bottom shell: Nylon, fiberglass, 316 stainless steel Charging way: Magnetic charging Charging time: 2 hours Compatible with Android 4.4 and later, iOS 8.0 and later MCU main processor: NORDIC 52832 Blood pressure measurement chip: OSRAM2703 (oscillometric blood pressure function) Inflatable Pum