Modern wearable gadgets have ceased to be just toys for technogeics, turning into indispensable assistants for millions of people. Xiaomi Mi Band 4 became a real hit sales, offering users a quality colored device. AMOLED-This activity tracker is not only able to tell the time, but also to deeply analyze your physical condition.
Many owners use the device to only 10 percent of its real potential, limiting themselves to looking at steps and notifications. But inside the compact case, there is a powerful set of algorithms and sensors. In this article, we will take a closer look at what a fitness bracelet can do, how to set it up correctly, and what hidden features will help improve the quality of life.
Understanding the full range of the gadget will allow you to get the most out of your purchase, and we'll look at autonomy, measurement accuracy, and smartphone integration, and get ready to learn more about your tracker than you previously thought.
Bright AMOLED-screen
The first thing that catches your eye when you look at the Mi Band 4 is the display, and unlike the monochrome arrays that preceded it, it uses AMOLED technology, which provides deep black and high contrast, and it allows you to read information comfortably even in bright sunlight.
The screen resolution is 120 by 240 pixels, which gives a density of about 326 ppi. Thanks to this, the fonts look clear and the icons look detailed. The interface has become smoother, and animations when switching screens add premium to the device.
- 🎨 Support for more than 70 dials with the ability to customize the displayed data.
- ☀️ Automatic brightness control with built-in light sensor.
- 🖐 Gesture support: Wrist lift to activate screen and swipe for navigation.
The user can choose a static dial or an animated dial that responds to movements, and it is important to note that the dials can be changed directly through the wristband menu, as long as it is pre-synchronized with the application.
Monitoring of physical activity and sports
The main function of the device is activity tracking. The bracelet automatically recognizes the beginning of walking or running if you walk a certain distance. For more accurate data, it is better to activate the desired mode manually through the workout menu.
The Mi Band 4 has swimming, cycling, yoga and ellipsoid modes, and analyzes the pulse zones to warn if the load is too high or too low to burn calories, which is critical for effective exercise.
☑️ Preparation for training
⚠️ For proper calculation of steps and calories, try to wear a bracelet at a distance. 1-2 Wearing too freely can lead to errors in data.
Once you complete the exercise, you will receive detailed statistics, including average speed, pace and time spent in different pulse zones, and the data is instantly transmitted to the Mi Fit app (or Notify for Mi Band), where you plot progress.
Sensor accuracy: Pulse and sleep
The second-generation optical heart sensor, PPG, is continuously or on schedule, and it can track rhythm changes at rest and during exercise, and the algorithms are smarter and better at filtering out noises that occur when you're moving.
The bracelet analyzes the phases of deep, light sleep and periods of rapid eye movement (REM), also records moments of anxiety and time of falling asleep, and based on these data, assesses the quality of rest.
| Parameter | Description | precision |
|---|---|---|
| Pulse at rest. | Non-load measurement | Tall. |
| Pulse on running | Dynamic dimension | Medium/High |
| Sleep phases | Definition of depth | Tall. |
| SpO2 (Oxygen) | Not supported | N/D |
For health-watchers, a high-pulse alert function is available, so if your heart rate exceeds a predetermined threshold at rest, the vibrator will give you a signal, which helps you notice stress or malaise in time.
Why can't the bracelet see the pulse?
Smart Notifications and Management
Xiaomi Mi Band 4 is a great assistant, allowing you to not take your phone out of your pocket constantly. It displays notifications about calls, SMS and messages from messengers (WhatsApp, Telegram, Viber), the text of the message is displayed in full, supporting Cyrillic and emoji.
And you can also control the music that you play on your smartphone, and you can pause the track, turn on the next one, or change the volume, which is especially convenient when you're jogging or doing housework.
- 📞 Deflecting an incoming call by vibration or holding a button.
- 🔍 Phone search: bracelet will make the smartphone ring loudly.
- 📵 Do Not Disturb: Disabling notifications and backlights at a given time.
In the application settings, you can flexibly configure which apps are notifying you, and you can also use the “Block Screen When You Take Off” feature, which requires you to enter a pin code when you wear the bracelet if it has been removed.
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To make the text of messages read clearly, increase the font size in the Mi Fit app settings to “Large” or “Huge”.
Waterproofness and swimming
One of the key features of the model is the 5 ATM certification, which means that the device can withstand the pressure equivalent to a dive to a depth of 50 meters, with which you can shower, swim in the pool and dive.
There's a special "Swimming" mode that blocks the touch screen from random water taps, and the bracelet counts the number of strokes, the distance, and SWOLF, and after the session, the data is analyzed to improve the technique.
⚠️ Warning: Although the device is protected from water, it is not recommended to use it in hot water (sauna, hot bath) or under high jet pressure (water skiing, scuba diving.
After contact with seawater or chlorinated pool water, it is recommended to rinse the bracelet with fresh water and wipe dry.This will prevent skin irritation and corrosion of charging contacts.
Autonomy and charging
The 135mAh battery provides impressive running time. In normal use, with pulse monitoring and notifications on, the bracelet lives about 14-20 days. With active GPS use (via phone) and constant training, the time is reduced to 7-9 days.
Charging is done through a magnetic connector that needs to be removed from the main enclosure, and it takes about 2 hours to fully recover the capacity, and the indicator on the screen shows the percentage of charge and the status of the connection.
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For maximum charge savings, turn off constant pulse monitoring, leaving the measurement once every 10 or 30 minutes, and reduce the screen time after activation to 5 seconds.
To extend the life of the battery, try not to discharge the device to zero regularly, optimally put the bracelet on charging when there is 10-15% left, and avoid using cheap high-current power supplies, although the controller usually limits the input current.