Amazfit T-Rex Pro User manual

Amazfit T-Rex Pro User Manual
Contents
Operating Instructions and Function Navigation.....................................................3
Basic Operations ..........................................................................................................3
Touch Screen........................................................................................................................ 3
Physical Buttons................................................................................................................... 5
Daily Operations:............................................................................................................... 5
Operations while working out............................................................................................ 6
Function Navigation............................................................................................................ 7
Watch Wearing and Charging............................................................................................ 8
Before Use........................................................................................................................... 10
Device Pairing and Unpairing .......................................................................................... 10
Shortcut Control.................................................................................................................11
Flashlight ..........................................................................................................................11
Brightness Adjustment..................................................................................................... 12
DND Mode ...................................................................................................................... 12
Battery Saver Mode ......................................................................................................... 13
Theater Mode................................................................................................................... 14
Activities and Health..................................................................................................14
PAI....................................................................................................................................... 14
Activity goal .................................................................................................................... 15
Idle alert........................................................................................................................... 15
Heart Rate.......................................................................................................................... 16
Heart rate alerts................................................................................................................ 16
All-Day Heart Rate Monitoring....................................................................................... 16
Manual measurement....................................................................................................... 17
Sleep.................................................................................................................................... 17
Assisted Sleep Monitoring............................................................................................... 17
Sleep breathing quality monitoring.................................................................................. 18
SpO2................................................................................................................................ 18
Precautions for SpO2 measurement................................................................................. 18
Stress................................................................................................................................... 19
Workout Functions ....................................................................................................19
Editing the Workout List .................................................................................................. 20
Selecting a Workout........................................................................................................... 21
Starting a Workout............................................................................................................ 22
About GPS Search............................................................................................................. 22
Workout Pause or Ending................................................................................................. 23
Workout pause ................................................................................................................. 23

Ending a Workout ............................................................................................................ 23
More.................................................................................................................................... 23
Workout Assistant............................................................................................................ 23
Workout goal.................................................................................................................... 25
Workout settings .............................................................................................................. 25
Workout Alerts................................................................................................................. 26
Pool Swimming .................................................................................................................. 27
Terms ............................................................................................................................... 27
Viewing Workout Records................................................................................................ 28
Indoor Running Calibration............................................................................................. 29
Workout Status.................................................................................................................. 29
Real-Time Data Item Sorting ........................................................................................... 29
Automatic Workout Identification................................................................................... 29
Physical Indicators for Workouts..................................................................................... 30
Daily Maintenance.....................................................................................................34
Precautions .................................................................................................................34

Operating Instructions and Function Navigation
Amazfit T-Rex Pro features one AMOLED touch screen and four physical buttons.
Basic Operations
Touch Screen
You can swipe left/right or up/down on the watch face screen to switch between different function
pages.

Tapping and exiting: Tap to enter a specific function page. After entering a certain function page
by tapping, swipe right to quickly return to the previous menu level. Swipe left from the
notification list page to return to the watch face.

Physical Buttons
Daily Operations:
Button definition
SELECT button
1、Press and hold the button for 2s to power on the watch.
2、Press the button to light up the screen.
3、On the watch face screen, press the button to go to the workout list. (You can
also configure this operation to quickly enable other functions using Quick
start-up in system settings.)
4、Press the button on screens other than the watch face screen to go to the next
menu level or on any list screen to enter a subpage.
5、Press and hold the button for 12s to power off the watch.

BACK button
1、Press the button to light up the screen.
2、On the watch face screen, press the button to go to the app list.
3、On screens other than the watch face screen, press the button to quickly
return to the previous page.
4、On screens other than the watch face screen, press and hold the button to
quickly return to the watch face.
UP/DOWN button
1、On the watch face screen, press the button to switch between different
widgets or for shortcut control.
2、On any list screen, press the button to change the currently selected item.
3、On a long page, press the button to scroll up and down.
Operations while working out
Screen Not Locked
Screen Locked

Button definition
Screen Not Locked
Screen Locked
SELECT button
Workout pause
Workout pause
BACK button
Manual lap
Manual lap
UP/DOWN button
Page switching
Screen unlocking
Function Navigation
Swipe up on the watch face screen or press the DOWN button to switch widgets. Swipe down on
the watch face screen or press the UP button to enter the shortcut control screen, where you can
quickly turn on the flashlight, set the screen brightness, set the DND mode, enter the battery saver
mode and enter the theater mode.

Swipe left on the watch face screen to go to the app list.
Swipe right on the watch face screen to go to the notification list.
Watch Wearing and Charging
Daily wearing: We recommend that you wear the watch at a moderate tightness at a distance of
two fingers from your wrist to ensure that the optical heart rate monitor works properly.

Wearing during workouts: We recommend that you wear the watch comfortably and ensure a tight
fit that does not slip. Being too tight or too loose may cause inaccurate detection of workout data,
which must be avoided.
Charging
1、Insert the USB port of the watch charger in a device that supports USB power supply, such as
a socket, a PC, or a power bank.
2、Put the watch into the magnetic charging base. Pay attention to the direction and position of
the watch, and ensure that the metal contacts on the back of the watch fit snugly onto the
charging base.
3、The screen will display a charging notification when the watch is placed properly.

Before Use
Download the app via your phone before using Amazfit T-Rex Pro. You need to pair the watch
using the app to use all functions. In addition, a paired watch allows the saving of data generated
on the watch to your personal account in the cloud, which will avoid data loss.
Device Pairing and Unpairing
1、Download the app from an app store or by scanning the QR code on the watch, and register an
account or log in to your account.
2、Open the app and tap + in the upper left corner or go to Zepp APP > Profile > +Add >
Watch > Watch with a QR code, and scan the QR code on the watch as prompted.
3、Complete pairing as prompted on the watch and your phone.
4、Upgrade the system on the watch after pairing. During the upgrade, keep your phone
connected to both the network and the watch via Bluetooth to ensure that the upgrade is
successful.

5、You can use the features provided by the watch after pairing and upgrade. You can also use
the app to configure the watch.
6、To unpair your watch, open the app, go to Profile >Amazfit T-Rex Pro, and tap Unpair.
Shortcut Control
Swipe down on the watch face screen to quickly enter the shortcut control page.
Flashlight
Tap the flashlight icon to enable the flashlight. The watch screen displays a white background that
can illuminate a small area at night. And you can disable the flashlight function by swiping right
or pressing the BACK button.

Brightness Adjustment
Tap the brightness adjustment icon to enter the brightness adjustment screen.
Auto brightness: Once enabled, the watch automatically adjusts screen brightness based on
ambient light, and you cannot move the screen brightness slider.
Manual brightness: Adjust the brightness by dragging the brightness slider up/down or pressing
the UP/DOWN button.
The brightness adjustment will take effect immediately. Swipe right on the screen or press the
BACK button to return to the previous screen.
DND Mode
DND: Once enabled, the watch will no longer receive incoming call reminders from your phone.
Deselect to disable DND.
Scheduled DND: You can customize the time period during which the DND mode is automatically
enabled or disabled.

Battery Saver Mode
The battery saver mode can maximize the battery life of your watch. After the battery saver mode
is enabled, the watch will only display the time and record your number of steps and sleep
information. Other functions are disabled.
Press and hold any button to exit this mode.

Theater Mode
When the theater mode is enabled, screen brightness is automatically reduced, and screen lit upon
wrist lift is temporarily disabled to keep your watch screen dark. And this is the easiest way to
make sure you watch doesn’t light up in the middle of the night.
Replacing the Watch Face
Tap and hold the watch face for 2s on the watch face screen or go to Settings > Watch Face, and
swipe left and right to select a watch face.
To replace the watch face in the app, go to Profile >Amazfit T-REX Pro > Store, and download
more watch faces from the Watch Face Store.
Activities and Health
PAI
PAI is used to measure a person's physiological activity and reflect overall physical condition. It is
calculated based on a person's BMP, the intensity of daily activities, and physiological data.
By maintaining a certain intensity of daily activities or workouts, you can obtain your PAI value.
According to the results of the HUNT Fitness Study*, maintaining a PAI above 100 helps reduce
the risk of cardiovascular death and increase life expectancy.
For more information, open the app and go to PAI > PAI Q&A.
* The HUNT Fitness Study is a sub-project of the HUNT study, led by Professor UlrikWisloff at
the School of Medicine, Norwegian University of Science and Technology. It has lasted over 35
years and involved more than 230,000 participants.

Activity goal
The watch automatically records your activity data, including steps, KCAL, standing events, and
distance. It also records the duration that BMP is maintained within or above the fat-burning range
as an index of fat-burning time.
Your daily activity goal consists of three parts, including Move ring (with target steps or calories),
Fat burning ring, and Stand ring.
The watch vibrates when you achieve a daily goal.
Idle alert
To encourage you to have a certain amount of activity every hour when you are awake and reduce
the harm caused by sitting for too long, the watch monitors your activity as you wear it.
If no activities are detected for more than one minute at the 50th minute of the current hour and you
are wearing the watch correctly, the watch vibrates to remind you to work out. When you receive a
standing alert, do activity before the next hour arrives to achieve the current hour's standing goal.

How to enable:
Keep the watch connected to your mobile phone, open the app, go to Profile > My
Device >Amazfit T-Rex Pro >Notification & Reminders > Idle alert, and enable the function.
Heart Rate
Heart rate is an important indicator of physical condition. Highly-frequent heart rate measurement
helps capture more heart rate changes and provide a reference for a healthy lifestyle.
To ensure measurement accuracy, you need to wear the watch correctly according to the tips, and
ensure that the part next to your skin is clean and free of sunscreen smear.
Heart rate alerts
You can enable the heart rate alert feature when you set all day heart rate measurement mode with
a measuring frequency of less than 10 minutes.
The watch vibrates when the measured heart rate is greater than the predefined value and you have
not done any detectable activity for the past 10 minutes.
All-Day Heart Rate Monitoring
1、Keep the watch connected to your phone, open the app, go to Profile >Amazfit T-Rex Pro >
Health Monitoring, enable All-Day Heart Rate Monitoring, and set the measurement
frequency. Then, the watch automatically measures the heart rate at the scheduled frequency
and records heart rate changes throughout the day.
2、Heart rate changes are more intense when you are working out. Enable Active heart rate
monitoring to allow the watch to automatically increase the measurement frequency when it
detects an activity so that more heart rate changes can be recorded.

3、The watch's heart rate app allows you to view the heart rate curve and heart rate distribution
throughout the day.
Manual measurement
When all-day heart rate measurement is disabled, you can press the upper button on the watch face
screen to go to the App List and swipe up and down on the screen to select the Heart Rate app for
manual heart rate measurement.
You can set the Heart Rate app as a shortcut widget to start heart rate measurement more
conveniently.
The watch only allows you to view the heart rate that is measured each time. To view historical
records, you need to synchronize data to the app.
Sleep
Sleep quality has an important impact on human health.
If you wear the watch while sleeping, the watch automatically records sleep information. You can
synchronize sleep information to the app to view the sleep duration, sleep stages, sleep score, and
sleep suggestions.
Assisted Sleep Monitoring
Keep the watch connected to your phone, open the app, go to Profile >Amazfit T-Rex Pro >
Health Monitoring, and enable assisted sleep monitoring for more accurate sleep information
(REM sleep stage).

Sleep breathing quality monitoring
Keep the watch connected to your phone, open the app, go to Profile >Amazfit T-Rex Pro >
Health Monitoring, and enable sleep breathing quality monitoring. The watch will automatically
monitor the sleep breathing quality when it detects that you are wearing the watch during sleep.
SpO2
SpO2 is an important physiological parameter of respiration and circulation.
1、Wake up the watch, go to the app list, and select the SpO2 app to start measuring SpO2.
2、When you are climbing a mountain or hiking outdoors, you can go to Workout Settings >
Workout Assistant and enable SpO2 for SpO2 measurement.
3、After measurement is completed, the watch displays the measurement result. You can also
view measurement results for the entire day.
Precautions for SpO2 measurement
1、Wear the watch a distance of one finger away from the carpal and remain still.
2、Wear the band tightly, with an appropriate sense of pressure.
3、Place your arm on a tabletop or a stationary surface, with the watch screen facing up.
4、Maintain still during measurement and focus on the measurement.
5、Factors such as hair, tattoo, shaking, low temperature, and incorrect wearing of the watch may
affect measurement results, and even lead to measurement failure.
6、The measurement range of the watch is 80%-100%. This feature is for reference only and
should not be used as a basis for medical diagnosis. If you feel unwell, please seek medical
advice.

Stress
The stress index is calculated based on changes in heart rate variability. It is a reference for health
status evaluation. You should rest more when the index is high.
1、Wake up the watch, press the upper button to go to the app list, and swipe up and down to
select the Stress app to view related information.
2、When All-day pressure monitoring is enabled in the Stress app, stress will be measured every
5 minutes to record the changes in your stress throughout the day. Keep the watch connected
to your phone, open the app, go to Profile >Amazfit T-Rex Pro > Health Monitoring, and set
the function.
3、If all-day pressure monitoring is disabled, you can access the Stress app for measurement at
any time and view and record the results.
Workout Functions
The watch supports more than 100 workouts. The default 24 workouts in the workout list are
outdoor running, walking, treadmill, trail running, indoor walking, outdoor cycling, indoor cycling,
pool swimming, open water swimming, climbing, outdoor hiking, elliptical trainer, rowing
machine, soccer, outdoor rowing, surfing, strength training, indoor fitness, free training, skiing,
snowboarding, cross-country skiing, jumping rope, and stair climbing.
To customize the workout list, select Edit List at the bottom of the workout list.

Editing the Workout List
1、Select Workouts in the app or press the SELECT button on the watch face (if quick start-up is
set for workouts) to go to the workout list.
2、Select the workout to start in the workout list.
3、Select More Workouts to view all workout modes and start a workout.