1. Continuous heart rate monitoring: Pair the Watch Pro with the CMF Watch app. In the app, go to the health check feature and select Continuous Heart Rate Monitoring. Set the switch to on. Put on the Watch Pro and it will start to automatically measure your heart rate. 2. Manually measure your heart rate: (1) Put on the Watch Pro, and remain still. Press the button to open the function list, and select Heart Rate. Tap to enter, and the Watch Pro will start to measure your current heart rate. (2) Put on the Watch Pro, and remain still. In the main interface, swipe left or right on the shortcut cards until you get to the Heart Rate interface, and the Watch Pro will start to measure your current heart rate.