Heart rate monitoring can be affected by various environmental and situational factors. If you find that your heart rate measurement is unsuccessful during use, or the data is incorrect, please refer to the following:

• If your watch is fastened loosely or not attached correctly to your wrist, it will not be able to obtain data by measuring your blood flow. In this case, check that your watch is on your wrist properly and that the watch face is facing upwards. It is recommended that you wear it slightly above your wrist joint for maximum comfort. Check that your watch is attached correctly to your wrist while you are exercising to prevent it from slipping.

  

• Ensure that the back of your watch is clean, dry, and not obstructed by any foreign objects. Excessive sweating during exercise can cause your watch to slip or obstruct light reflecting off the skin that is used for the measurement, resulting in inaccurate data. In this case, remove your watch and wipe off any sweat or smudges, then reattach it to your wrist.
• Ensure that the skin on your wrist is free of scars, tattoos, or excessive hair that may affect the heart rate measurement.
• Extreme low temperatures may also alter the blood flow of the human body and cause the heart rate measurement to be inaccurate. In this case, it is recommended that you initiate a heart rate measurement once you have warmed up.
• Heart rates are much easier to measure during exercises with regular movements (such as running, walking, and riding a bicycle) compared to exercises with irregular movements (such as basketball and relaxed activities to pass the time), while exercises that strengthen (such as weightlifting) may make it difficult for the band to obtain an accurate heart rate measurement. Please refer to the workout menu on your watch to engage in the corresponding type of exercise.

If you find that your heart rate is abnormal during a workout, keep your watch facing upwards and stand still for approximately 10 to 15 seconds for your heart rate to return to normal. If your heart rate cannot be measured after multiple attempts, it is recommended that you restart your watch and try again.