1. 1. Please wear the Watch Pro correctly. 2. The distance/speed is calculated using the Gsensor algorithm, which allows for a certain amount of error. To ensure the accuracy of measurements, please wear the Watch Pro at least one or two fingers' distance from your wrist joint. Wear the strap loose enough for comfort, but tighten it for more accurate measurements during exercise. 3. If the above instructions do not solve the issue, press the button on the Watch Pro to enter Settings--System Menu, then click Restart. Or, press and hold the button, then click Restart and check again. 4. To experience the latest firmware features, you can upgrade the firmware to the latest version in the CMF Watch app. To do this, open the CMF Watch app, go to the Device page, and click Device Upgrade. 5. If the above steps do not resolve the issue, press the button on Watch Pro to enter Settings--System Menu. Click Reset. Then, check again to see if the issue is resolved.