Amazfit GTS 2 New Version Smart Watch

Product Information

Heart Rate Monitor
The heart rate monitor is a device that measures your heart rate. It is worn on the wrist and uses a pulse oximeter to monitor blood perfusion to the dermis. However, there are several factors that can affect the accuracy of the heart rate readings:

1. Improper wearing: Ensure that the device is worn on the top of your wrist and is snug against your skin to get the most accurate readings.
2. Irregular movements: Rhythmic movements like running or cycling provide better results compared to irregular movements like tennis or boxing. Tighten the watch band during workouts and loosen it afterwards to reduce false readings.
3. Skin perfusion/environment: Skin perfusion varies from person to person, and factors like dark skin, hairy wrists, tattoos, and scars can affect the accuracy of the heart rate readings.
4. Obstructed light sensors: If you notice inaccurate readings, try the following steps:
5. Take a second measurement if you think the reading is incorrect.
6. Ensure that the device is kept close to your skin.
7. Clean the heart rate sensor on the back of the device using a cotton swab soaked in rubbing alcohol. Wipe with a dry cloth or tissue to remove any debris.

Indoor Running Data
If you encounter inaccurate indoor running data, follow these steps:

1. Make sure to tie the watch properly.
2. Calibrate the mileage on the watch after the indoor run. The watch will learn your running style and provide more accurate mileage estimates for your next indoor run.
3. Ensure that the Zepp app is up to date.
4. Enter correct personal information in the Zepp app, including gender, height, weight, and age.
5. After completing an indoor run, go to the activities history in the app, find the record, and swipe left to calibrate the mileage. This option can only be accessed if you tap calibrate after completing the run.

Step Count Data
If you notice inaccurate step count data, follow these steps:

1. Make sure the wrist placement settings are correct. Wear the device two fingers’ width below your wrist bone.
2. Do not wear the device too tight. It should be slightly tighter during exercise than during all-day wear.
3. Double check that you entered your height correctly in the app, as it is used to estimate your walking and running stride lengths.
4. Answer the following questions to help troubleshoot the issue:
5. How do you know that your watch is counting fewer steps?
6. Did you wear both devices on the same hand?
7. What type of activity were you doing and for how long? Note that the watch has stricter requirements for step counting and may filter out certain activities like tennis, badminton, or basketball.

Troubleshooting

| Sub Issue / Customer’s response| Recommendation| Title| Steps|

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1| Inaccurate Results| 1. Make sure to tie the watch properly.

2. Zepp app should be up to date.

3. Ensure that you enter correct personal information in the Zepp app, including your gender, height, weight, and age.

| Inaccurate heart rate data| Regarding heart rate monitor, it may be caused by the following:

1) Not wear it properly
Inaccurate heart rate readings appears to be due to the fit of the device band itself. A loosely fitting band that moves around at all, or that has notable gaps between the device and the skin, can easily cause an inaccurate reading. For the most accurate heart rate readings, you will want to be sure you’re wearing the device on the top of your wrist and it’s fairly snug against your skin.

2) irregular movements
Rhythmic movements, such as running or cycling, give better results compared to irregular movements, like tennis or boxing. We advises tightening your watch band for workouts to reduce any chance of false readings, then loosening it when you’re done.

3)Skin perfusion/environment affect performance
As the heart rate sensor is basically a pulse oximeter which monitors the perfusion of blood to the dermis, it’s prone to inaccuracies.That’s because skin perfusion — a measure of how much blood flows through your skin — varies significantly from person to another.

Especially the ones who have dark skin, hairy wrists, tattoo, and scar. 4)Light sensors on the back of the device are obstructed
if you’re seeing a reading that doesn’t look quite right, please check the following:

1. Take a second measure if you thought the reading isn’t right.

2. Keep it close to your skin

3. Clean the heart rate sensor

Soak a cotton swab with rubbing alcohol and clean the surface of the sensor on the back of the device. Make sure that no debris from the swab is left behind.

Wipe with a dry cloth or tissue.

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2| Inaccurate indoor running data| Zepp algorithm is designed to look for motion patterns that are most indicative of people walking. The algorithm determines whether a motion’s size is large enough by setting a threshold. If the motion and its subsequent acceleration measurement meet the threshold, the motion will be counted as a step. If the threshold is not met, the motion won’t be counted as a step. Other factors can create enough acceleration to meet our threshold and cause some over counting of steps, such as shaking hands or moving arms. Equally, it’s possible for the algorithm to undercount (not meet the required acceleration threshold). Examples include walking on a very soft surface such as a plush carpet or not moving arms when walking.

After the indoor run, you can calibrate the mileage on the watch. As the number of calibrations increases, the watch will learn your running style and make more accurate mileage estimates for your next indoor run.

After you complete and save an indoor run, go to activities history and find the record. Swipe left and you can calibrate. It can be calibrated once. If you didn’t tap calibrate after completing the run, this option can not be accessed. Hope this info helps.

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Inaccurate steps count data

| Zepp has a finely tuned algorithm for step counting. The algorithm is designed to look for motion patterns that are most indicative of people walking. The algorithm determines whether a motion’s size is large enough by setting a threshold. If the motion and its subsequent acceleration measurement meet the threshold, the motion will be counted as a step. If the threshold is not met, the motion won’t be counted as a step. Other factors can create enough acceleration to meet our threshold and cause some over counting of steps, such as shaking hands or moving arms. Equally, it’s possible for the algorithm to undercount (not meet the required acceleration threshold). Examples include walking on a very soft surface such as a plush carpet or you didn’t move your arms when walking.

If you feel that your step count is inaccurate:

First make sure the wrist placement settings are correct. And please wear your device two fingers’ width below your wrist bone to have a try. Do not wear your device too tight and the device should also be slightly tighter (snug but not constricting) during exercise than during all-day wear.

Next, double check that you entered your height correctly since we use height to estimate your walking and running stride lengths. Please also answer the following questions if possible to help us troubleshoot the issue:

1. Could you please clarify how you know that your watch counting less steps?

2. Did you wear both devices on the same hand?

3. What type of activity were you doing and for how long? Like playing basketball or badminton? With the latest algorithm update, our watch has stricter requirements for step counting. And the watch will filter out those unreal walking, like playing tennis, badminton or basketball. Hope you understand.

4. How long have you worn both devices before comparing the two?

5. What was the time frame in which you were monitoring your comparison? (e.g. one hour, one day, several days)

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4| Inaccurate calories data| Calories (or kcal) is a measure of the energy you’ve burned during your activity. Our algorithm didn’t include BMR (basal metabolic rate). You may notice differences between our calculations and those from other tools, even given the same activity data. This is most likely due to differences in Calorie calculation algorithms, and the data factored into the calculations. We believe our estimation is as accurate as possible given the limitations in data.

If you still feel that the calories data is inaccurate, please send us some screenshots of the latest activity including Details, Route and Graph (screenshots of the heart rate curve) from the app so that we may guide you future in this regards.

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| Sub Issue / Customer’s response| Recommendation| Title| Steps

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1| Battery Backup| The device’s power consumption depends largely on how you use it. It is recommended that you disable rarely used features, to extend the device’s battery life.| Watch battery drain quickly| Disable the following features if you do not use them.

1. Raise wrist to wake screen

2. Unnecessary app notifications

3. Bluetooth disconnection reminder

4. Automatical/continuous heart rate monitoring

2| Not Charging| Check the charging end of the Watch body, and determine which side has metal strips.

1. Before charging, make sure that the charging port and metal parts are clean and dry to prevent short circuiting or any other risks.

2. If the Watch screen flickers or goes black, connect it to a power source to restart the Watch.

3. Use a genuine charger with a rated output voltage of 5 V and a rated output current of 1 A or 2A or a computer to charge your band. Using a non- genuine charger may be slower and could cause your band to heat up.

| watch not charging| 1.Align and attach the charging port to the magnets of the charging cradle. Ensure that the side of your watch with metal contacts is aligned with the charging port of the cradle. You should see the battery level on the watch face. 2.It is recommended that you use the charging cable and charging cradle that come with your watch.

3. Before charging, make sure the charging port is dry. Wipe off any water or sweat.

4. The watch does not come with a charger. Please use a 5 V charger to charge your watch.

5. The Watch body will vibrate to indicate that it is being charged properly. If it doesn’t vibrate, remove the Watch and try again.

3| Charging Slow| 5V 0.5A / 1A / 1.5A / 2A

In case charger voltage and current is different from requirement then charger may not work or may affect battery of Watch.

It takes about 90 minutes to fully charge your Watch with a 25°C room temperature. Once the battery icon is full, your Watch is fully charged.

| Watch Charging Slow| To ensure battery safety, the charging current will be decreased substantially when the ambient temperature is too low. This means it will need longer to charge. It is recommended that you charge your band in an environment with an ambient temperature higher than 20°C.

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