This product is suitable for people's daily weight and body fat measurement. It should not be used by people with implanted medical devices (e.g., pacemakers, cochlear implants, etc.) or by pregnant women.
The body fat percentage for users with a fever due to cold or flu, osteoporosis users with very low bone density, users with edema, users on artificial dialysis, and those who work out or play sports as a profession may be different from those of an average person, so the measurement value is only for reference.

Battery model: Open the battery cover on the back, remove the insulator tab, install the battery into the battery compartment correctly according to the polarity, close the battery cover, and the scale will turn on automatically.
Rechargeable model: Charge the battery to ensure that the scale is fully charged, the scale will turn on automatically.
If the scale is not operated for a long time, it will automatically turn off the screen and enter standby. The scale will wake up automatically when you get on the scale again.

1. The screen isn't displaying anything: Please check whether the battery still has power, reinstall the battery, or charge it. If there is still no display, it is recommended to try replacing the battery or USB cable.
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2. The screen displays Lo: The battery power is running low. Please carefully check that the battery is installed correctly and confirm that it still has power. If it still displays Lo, it is recommended to replace the battery.

3. The screen displays Err: The sensor of the scale has been overloaded or damaged. Please do not measure more than the capacity of the scale. Remove weight immediately or damage can be caused.

4. The screen displays C: The scale is self-calibrating due to an error that has occured during measurement. Please step off the scale and step onto it again to repeat the measuring process.

1. Please remove the batteries if if the product eill not be used for a long period of time.

2. Because the product is subject to transportation bumps that may lead to software lock, USB models need to be charged for 5 minutes to activate the scale.

1. Users under the age of 18 will need assistance from a parent or guardian to create a profile.
2. For users 0-2 years old, only baby mode can be used to measure weight, which will only display and save weight data.
3. For users 3-4 years old in children mode, the scale can use normal measurement mode to measure weight, which will only display and save weight data.
4. For users 5-11 years old in children mode, the scale can only display and save weight and BMI, and doesn't support body composition measurement.
5. For users 12-17 years old in teenager mode, the scale will display weight, BMI, and body composition measurement. The body fat percentage will be different from normal. Suggested measurement values are for reference only.
6. For users age 18 and above, the scale will display weight, BMI, and body composition measurements that are supported.
7. For athletic users who work out or play sports as a profession (18 and above), the scale will display weight, BMI, and body composition measurements. Body fat percentage will be different from that of a normal person. The measurement values are recommended for reference only.

Add members:
1. Open "Precision Hub" app, Overview page > click on the weight chart > [More] > [User Management] > [Add Member].
2. According to the prompts, fill in the basic information of the member and click "Confirm" to save.
3. According to the prompts, carry out a measurement. When the measurement is finished, adding the member is complete.

Edit members:
1. Open "Precision Hub" app, Overview page > click on the weight chart > [More] > [User Management] > corresponding member.
2. Edit the basic information of the member that needs to be changed. Then click "Confirm" to save and finish editing the member.

Delete member:
1. Open "Precision hub" app, Overview page > click on the weight chart > [More] > [User Management] > corresponding member.
2. At the bottom of the screen, click the "Delete" button and follow the prompt to delete the member.

The BIA (Bioelectrical Impedance Analysis) measurement method requires your height/age/gender information in conjunction with the weight and body impedance information given by the scale for the body fat percentage measurement.

We will keep your information confidential and ensure that it is only used for the adiposity algorithm and not for any other purpose.

Delete account:
1. Click [Profile] > [Account Management] > [Delete Account].
2. Click "Delete Account" according to the prompts. The account will be deleted after 7 days.

*If the user logs into the account again, the deletion will be automatically canceled.

Can I recover my account after deleting it?
No, you can't recover your account after it is deleted. If you register with the same email address, a new account will be created. If you log in again within 7 days after performing this action, the account deletion process will be stopped.

Open "Precision Hub" app, Overview page > click on the weight chart > [More] > [User Management] > select your user > [User type] > scroll through the options and select Athlete > [Save] > [Confirm].

Please note the app default setting is 'Standard'.

1. Search "Precision Hub" app in the app Store to download. If "Precision Hub" is already installed on your phone, please ensure it is updated to the latest version.

2. Open "Precision Hub" app, register and log in, click [Devices] > [+ Add Device] > [Scale] > [Searching for device] to start pairing.

3. According to the prompts, wake up the scale after stepping on it with bare feet. The app will automatically search for the device and list the Bluetooth device name and MAC address. Select the scale that needs to be paired.

4. Once you select the scale, stand on the scale with bare feet to take a measurement. When the measurement is finished, the device pairing will be completed.

1. The scale can only be connected to one cell phone and app at the same time. If the Bluetooth icon is shown on the scale, it may have been connected to another cell phone.

2. If the scale is already connected to another cell phone, you can close the app or temporarily turn off the Bluetooth on that cell phone. If the Bluetooth icon disappears, you can try to connect to the scale again.

1.Open the [Health] app in your iPhone.

2.Click [Data Source] and select [Precision hub] .
3.After successful connection, Precision hub will synchronize the data with Apple Health, you can control the synchronization authority of each type of data.

1.Open the [Health] app in your iPhone.

2.Click [Data Source] and select [Precision hub] .
3.After successful connection, Precision hub will synchronize the data with Health Connect, you can control the synchronization authority of each type of data.

1.Open the [Health] app in your iPhone.

2.Click [Data Source] and select [Precision hub] .
3.After successful connection, Precision hub will synchronize the data with Fitbit, you can control the synchronization authority of each type of data.

Open your scale from the Devices page, find the "Goal" on the top of the page, and click the arrow on the right side. Use the slider or click on the pencil to set your goal weight and body fat percentage.

After setting the goal weight, the goal weight will be displayed in the Goal chart.

The supported weight units are kg, lb, st:lb.

Set the weight unit on the scale:
Find the "Unit" button at the bottom or side of the scale, and press "Unit" to switch the unit when the scale is on.

Set the weight unit in the app:
Open the app, [Profile] > [Unit Switch] > [Weight Units].

The units will be synchronous, whether you set the unit in the scale or the app.

When the app is open:
1. Open the scale on the Devices page, and in the upper right corner of the user's head portrait, you can switch to the corresponding sub-user.
2. Step on the scale and start measuring.
3. After the measurement, the data will be saved in the corresponding sub-user.

When the app is closed:
1. With the app closed, step on the scale and start measurements.
2. After the measurement, the data will automatically recognize the user based on the weight data and the historical measurement data of the user.

1. Open the app, click the scale on the Devices page, and find the edit pencil icon in the Body Index section.
2. According to the prompts, edit the measurement date, time, body fat, and weight, then click "Save".

1. Open the app and click the scale on the Devices page.

2. Click [Trend] in the bottom menu and click [All Data] at the bottom to view all data.

1. Open the app and click the scale on the Devices page.

2. Click [Trend] in the bottom menu and click [All Data] at the bottom to view all data.

3. Click the data you wish to share and then view the data details. Click on the share icon in the upper right corner to share the data with other apps or your friends.

1. Open the app and click the scale on the Devices page.

2. Click [Trend] in the bottom menu, and click [All Data] at the bottom to view all the data.

3. Click the three dots in the upper right corner, then click "Compare" to check the two data sets that you wish to be compared. You can view the data differences between the two data sets.

1. You are not standing on the scale with bare feet. Wearing shoes or socks can cause the electrodes to fail to measure body data.

2. The scale is not placed on a flat, hard surface. Placing the scale on a carpeted or raised surface will result in deviations in the data.

3. Weighing without standing still. After weighing, wait until the weight stabilizes or the display on the scale flashes 3 times before the weighing is complete.

4. The soles of the feet are not stepping on the electrodes. The soles of your feet need to touch the electrodes, and stand still to measure.

5. Incorrectly setting personal information. When personal information is filled out incorrectly, usually the age is too young or the height is abnormal, which is beyond the measurement range of the body fat scale, the body fat percentage will not be measured, only the weight will. Please check if the basic personal information is incorrect.
For example, the user's height was originally 150cm, but 50cm was selected by mistake, resulting in the measurement range being exceeded. After modifying 150cm, the measurement is normal.

6. Out of age range. Users younger than 10 years old or older than 99 years old can only measure weight and BMI data, and will not be able to measure body fat percentage and other body data.

Fat is a special tissue complex in the body, which includes subcutaneous fat, visceral fat, etc., and is widely found in all parts of the body.

There are several popular methods of monitoring and measuring changes over a long period of time, including DEXA, BIA, weighing in water, etc. Each method has its own unique algorithm and has different results.

To date, weighing in water and DEXA (Dual Energy X-Ray Absorption) have been called the "gold standard". However, there are errors in the repeat test results of these gold standards. Therefore, the biggest problem with body composition analysis is that no single instrument can give an absolutely correct answer.

Most manufacturers of home body fat scales use the BIA measurement method, which also varies according to different algorithms, so it is not recommended that users focus on the difference in absolute values between measurements taken on different devices.

Rather, it is more important to focus on the relative values of long-term measurements on the same device. Therefore, we recommend that users try to use the same evaluation system to monitor and measure adiposity over a long period of time, as the long-term changes can be assessed to obtain the trend of a person's health status, and the control of the health trend is the most important, so we believe that the relative value of the change is more meaningful than the absolute value of a single measurement.

In terms of the chemical structure of the human body, the main components of the human body include body fat tissue, water, protein, and inorganic tissue. Adipose tissue is mainly composed of fat, water.

The scale measures the amount of fat tissue, muscle tissue, water, and other major tissues in the human body. Since each of these tissues contains a significant percentage of water, the measurements of the final product will add up to more than 100%.

The app will display a “Synchronize Data” button only if your specific scale requires manual offline measurement transfers. Tap the "Synchronize Data" button and wait for your offline measurements to upload. Some models sync automatically - in those cases, you won’t see the button at all.

Open "Precision Hub" app, click [Profile] > click on Device Manager> click the device which need to be unpaired, and click the delete icon on the upper right corner. The device will be unpaired and deleted from your app.

Find the "RESET" pinhole or "UNIT" button on the battery cover or side of the scale. Press and hold the button until the screen lights up; then the recovery is complete.

1. Open the app and click the scale on the Devices page.

2. Click [Trend] in the bottom menu, and then click [All Data] at the bottom.

3. Click the three dots in the upper-right corner and select "Export" to enter the [Export Records] function.

4. Click on the data records that you wish to be exported and click "Export". The corresponding data can be generated into a table to save.

Update the version:
1.Before starting the update, please make sure the body fat scale has sufficient power.
2.Open the app, click [Settings] > Select the body fat scale that needs to update the version and enter the settings.
3.Check the firmware version, if there is a new version to update, there will be a red dot.
4. If there is a new firmware to update, click the firmware version to enter the update interface.
5. According to the interface prompts, stand on the the scale and wake it up. Start to update the version, and please make sure the scale is not turned off during the update process.
6. When the update is complete, the scale will reboot.

Keep the product free of dust and oil, and use it in a well-ventilated and dry environment to prevent rust and corrosion.

The product is a measuring instrument. It is recommended to be cleaned regularly, and when it is not used for a long time, please remove the battery.

It is recommended to store the product in a place that protects it from sunlight, moisture, and dust.

If the surface of the scale is made of glass and the glass is broken, please stop using it to avoid cutting your skin. At this time, please contact customer service.