Smart bracelets have become key pieces for managing the health, physical activity, and daily well-being of millions of people around the world. Among the wide variety of wearables available on the market, the Xiaomi Mi Band 4 It has established itself as one of the most recommended options, thanks to the combination of advanced technology, remarkable autonomy or with a very competitive priceThis device not only stands out for its innovations, but also maintains Xiaomi's unmistakable DNA: democratizing access to practical and efficient technology.
Since its launch, the Xiaomi Mi Band 4 has generated a new wave of interest in fitness trackers, leading sales and garnering positive reviews on every continent. Its secret? A near-perfect balance between features, ease of use, customization, and cost. It also incorporates substantial improvements over previous generations and is suitable for both beginners and advanced athletes.
Why the Xiaomi Mi Band 4 revolutionized the wearables market
The evolution of the Mi Band range, led by Xiaomi, is an example of constant adaptation to what users truly want in a smartband. The Mi Band 4 is the answer to a global demand for compact, powerful, and functional devices at an affordable cost. It offers:
- Color AMOLED display which multiplies the visual experience and makes it stand out from monochrome bracelets.
- Minimalist and lightweight design that goes almost unnoticed on the wrist, but with enough personality.
- Universal strap compatibility: Even those from previous generations often fit, increasing the possibilities for customization.
- Intuitive and updated software thanks to the Mi Fit app and its health and sports ecosystem.
El price This is another major success factor. The Mi Band 4 managed to offer features typical of much more expensive devices for a truly affordable price, which popularized the use of smartbands among all types of users.
Technical sheet and detailed specifications of the Xiaomi Mi Band 4
Knowing the Xiaomi Mi Band 4's hardware configuration and capabilities in detail is essential to understanding its capabilities. Below are the key points and technical features:
- Display: Color AMOLED, 0,95 inches, 24-bit, 240 x 120 pixel resolution, reaches up to 400 nits of brightness, 100% touch surface with capacitive sensor.
- Dimensions and weight: Compact capsule size, weight 22,1 grams (22,2 grams in the version with NFC), ergonomic design that does not bother you during training or sleeping.
- Battery: 135 mAh (without NFC) / 125 mAh (with NFC), theoretical battery life of up to 20 days, actual battery life of about 10-15 days with intensive use.
- Connectivity: Bluetooth 5.0 LE, efficient, fast and stable synchronization, version with NFC (limited use depending on region and compatible services).
- Internal Memory: 16 MB, optimal for managing the bracelet's apps, watch faces, and temporary data.
- Compatible operating system: Android since version 4.4 and iOS since 9.0.
- Sensors: Optical heart rate sensor, 6-axis accelerometer, gyroscope, proximity sensor.
- Waterproof: 5 ATM certified (waterproof up to 50 meters). Safe for use in the pool, shower, and during water sports.
- Personalization: Interchangeable straps compatible with previous generations and hundreds of models in different materials, predefined and customizable dials.
- Additional functions:
- Music control (native and compatible apps like Spotify, YouTube, and mobile players)
- Timer, stopwatch and alarm
- Smart Phone Unlock and Find My Device
- Do Not Disturb mode and programmable night brightness
- Smart notifications for calls, messages, emails, and apps (with logos and sender)
- Weather forecast, weather viewer and calendar events
- Inactivity alert with customizable vibration
- Remote camera control on compatible mobile phones and third-party apps (requires special pairing in some cases)
- Firmware and feature updates via OTA (Over The Air)
La screen surface It's 40% larger than the Mi Band 3, making it easier to read and navigate. The glass design features softly rounded edges for a better feel and reduced glare.
AMOLED color display: The ultimate visual leap for a smart bracelet
La color AMOLED screen The Mi Band 4 elevates the user experience to the next level. Compared to the monochrome or OLED displays of previous generations, we now have:
- Vivid colors and intense contrasts both indoors and in direct sunlight.
- Adjustable brightness in five levels, allowing visibility to be adapted to any environment.
- Comprehensive touch control: Quick access to menus, notifications, sports functions and multimedia controls with smooth and precise swipes.
- Programmable night mode: The screen automatically reduces brightness at certain times to avoid discomfort during rest or in dark environments.
- visual customization thanks to dozens of watch faces, backgrounds, and themes, including the ability to install community-developed watch faces using specialized apps.
The result is a feeling of belonging to a higher range, with clarity of texts and notifications, elegant iconography and ease of consulting sports and health statistics in real time.
Design, comfort, and customization options: a bracelet for every occasion
El modular and minimalist design The Xiaomi Mi Band 4 makes it suitable for all tastes and situations:
- Removable capsule which fits perfectly on silicone, leather or metal straps (both the Mi Band 4 itself and previous versions).
- 12 adjustment positions for the standard strap, offering ergonomics on wrists of different thicknesses.
- Various colors and materials: Easily interchangeable, available in official stores and online platforms, including sporty, elegant and casual designs.
This versatility allows you to wear the bracelet to the gym, the office, or at formal events without it looking out of place. lightness and the rounded shapes ensure comfortable use all day long and even while sleeping.
Daily Fitness Tracking: Sport Modes and Sensor Accuracy
The sports section is one of the strong points of the Mi Band 4. Thanks to its combination of sensors and software improvements, it is capable of accurately and in real time recording the following six training modes:
- Running on treadmill
- Free exercise or "gym"
- Running outdoors
- Cycling
- Walk
- Swimming in the pool
Through the 6-axis accelerometer and gyroscope, the bracelet identifies and discriminates types of movements, allowing to accurately calculate:
- Steps and distance traveled
- calories burned
- Duration and intensity of exercise
- Real-time heart rate (and the ability to enable high heart rate alerts)
La swimming monitoring It's one of the biggest added values compared to many other smartbands. It allows you to select the type and length of pool, recognizes up to five types of strokes, and estimates the SWOLF index, essential for swimmers looking to improve their efficiency.
Thanks to its 5 ATM water resistance, the Mi Band 4 can be used safely in swimming pools, on the beach, or in the rain, although it is recommended that the screen be as dry as possible to avoid accidental touches.
Advanced health monitoring: sleep monitoring, heart rate and inactivity alerts
Taking care of your health goes beyond physical activity. That's why Xiaomi equipped the Mi Band 4 with a comprehensive sleep monitoring:
- Register the start and end of sleep, as well as the phases of deep and light sleep.
- Offer daily, weekly and monthly summaries on the quality and duration of rest, allowing for the detection of unhealthy habits and the optimization of sleep routines.
- It includes personalized recommendations through Mi Fit to improve rest.
Heart rate monitoring is continuous, and the frequency can be configured in the app. If abnormal values are detected, the bracelet vibrates to alert the user, a very useful feature, especially for people who want to monitor peak exertion.
El sedentary alert system It vibrates when it detects prolonged periods of inactivity, encouraging the adoption of healthier habits and reducing sedentary lifestyles.
Smart notifications, multimedia controls, and extras that make a difference
The Mi Band 4 acts as an extension of your smartphone on your wrist. Its smart features include:
- On-screen notifications of messages, calls, emails, and app events, including the app logo and sender.
- Does not allow direct response from the bracelet, just reject or silence them.
- Independent music control: : change songs, adjust volume, pause, and see the name of the playing track (compatible with most popular apps).
- Alarm, stopwatch and timer manageable from the bracelet and programmable in Mi Fit.
- Find My Phone feature: ideal for locating your mobile phone by vibration or sound.
- Weather forecast for several days, updatable via app.
- Adaptive brightness and do not disturb mode to avoid interruptions during the night or important meetings.
Remote camera control requires the use of specific apps and may be limited depending on the phone model, but it's a valued feature for those looking to take remote photos or group selfies.
Battery and autonomy: the strong point to forget about recharging for weeks
La Mi Band 4 battery It's one of its greatest achievements. Despite incorporating a larger color screen and advanced sensors, hardware optimization and efficient use of Bluetooth 5.0 allow for extended use on a single charge:
- Up to 20 days of autonomy in ideal conditions Using basic settings, periodic heart rate monitoring, and medium brightness.
- En intensive usage scenarios (high frequency of notifications, constant use of sensors, high brightness), the usual duration is around 10-15 days.
- Full charge between 60 and 90 minutes thanks to a proprietary charger with pins, easy to carry but requires removing the capsule from the strap.
- The excellent battery life is a definite advantage over many smartwatches, allowing you to focus on your workouts and daily life without worrying about battery life.
Comparison: Xiaomi Mi Band 4 vs. previous generations and alternatives
The Mi Band 4 represented a true evolution compared to the Mi Band 3, as well as other competing models, such as the Huawei Band and the OnePlus Band. Its most notable improvements include:
- 0,95-inch color AMOLED display (vs. 0,78-inch monochrome OLED on the Mi Band 3).
- Much higher resolution: 240 x 120 pixels, allowing for more information on the screen at the same time.
- More brightness (up to 400 nits) and full touch control, eliminating the physical button of previous versions.
- Bluetooth 5.0 vs 4.2, improving connection stability and range.
- Improvement in sensors and in the accuracy of the sports record.
- Expanded customization of dials and compatibility with multiple straps.
- optional NFC (depending on region), although its use outside China is limited.
Compared to the competition, the Mi Band 4 stands out for its reliability, battery life, support community, and the number of available apps and watch faces. The experience is much richer and more varied than many similarly or more expensive alternatives.
Installation, initial setup, and updates: first use and key tips
Getting started with the Mi Band 4 is intuitive and easy for anyone, even those with no prior experience with smart bands:
- Download the Mi Fit app from Google Play or App Store and log in with a Xiaomi, Google or third-party account.
- Pair the bracelet via BluetoothOnce selected, the app quickly detects it and asks you to confirm the pairing.
- Customize monitoring parameters: Heart rate, screen on when turning the wrist, alarms, notifications, sports modes, etc.
- Update the firmware via OTA (or resources like spheres added by the community).
In case of any problem, the bracelet can be easily reset to return to factory settingsThe Mi Fit app not only centralizes control, but also offers detailed graphs and analysis of activity, health and sleep.
Customization options: compatible straps, watch faces, and apps
One of the great attractions of the Xiaomi Mi Band 4 is its high level of customization: check compatible applications that allow you to modify spheres and functions according to your preferences.
- Silicone, leather, metal and sports straps, available in dozens of colors and styles.
- Compatibility with straps from previous models, allowing you to take advantage of accessories already purchased.
- Variety of digital spheres: both the official ones included and those downloadable through the community and apps like WatchFace for Xiaomi Mi Band 4. They combine icons, fitness data, and custom backgrounds.
- Third party apps such as Notify & Fitness, Amazfit or Mi Band Maps expand functionalities and compatibility with sports and health services (example: Strava, Google Fit, automatic synchronization, advanced alert customization, integration of new screens, etc.).
Limitations and minor disadvantages of the Xiaomi Mi Band 4
Despite its outstanding nature, the Mi Band 4 has some limitations compared to higher-end models or very specific needs:
- It does not incorporate integrated GPSTo record routes and journeys while running, cycling, or walking outdoors, you rely on the GPS of your paired smartphone.
- The use of NFC outside of Asia is restricted.Although it has an NFC version, its support for mobile payments and home automation is limited in most regions.
- It does not allow you to directly answer messages or calls from the bracelet, just reject or silence them.
- Proprietary charging system somewhat cumbersome, since it is necessary to remove the capsule from the strap to charge it.
- The accuracy of heart and sleep sensors It is suitable for casual use, but may not match specific professional devices in advanced medical or sports scenarios.
- The screen can detect accidental touches underwaterIt is recommended to keep it dry during swimming whenever possible.
Frequently Asked Questions (FAQ) about the Xiaomi Mi Band 4
- Does it have built-in GPS?
No, it uses the GPS of the synchronized smartphone to record routes during outdoor activities. - Can the language be changed to Spanish?
Yes, when you sync your band with the Mi Fit app and update the firmware, the Mi Band 4 will adopt the language you set on your phone. - Is it possible to receive notifications from all apps?
Yes, you can select which apps to display alerts and notifications from on your screen from Mi Fit. - Does it work with Strava and other sports services?
Yes, using the Amazfit app or Notify & Fitness as a bridge, you can sync your activity with popular platforms like Strava and Google Fit. - Is the 20-day battery life real?
Yes, with normal use (regular heart rate, moderate brightness, standard notifications), the battery can last up to 20 days. Heavy sensor use and frequent notifications can reduce battery life to about 10-15 days. - Is it compatible with any brand of smartphone?
Yes, with any Android phone (from 4.4) or iOS (from 9.0), as long as they can install the Mi Fit app. - Is the Mi Band 4 waterproof?
Yes. It has 5ATM certification, which guarantees resistance up to 50 meters underwater, although touch control may be impaired if the screen is wet. - Can new dials or custom designs be installed?
Yes, both from the official Mi Fit app and through third-party apps, with access to hundreds of new watch faces and themes.
Xiaomi Mi Band 4 price and where to buy it at the best price
La Xiaomi Mi Band 4 It is the reference in terms of value for money within the world of smart bracelets. Their cost is usually much lower than alternatives with similar features, and they're easy to find at competitive prices on various channels:
- Official Xiaomi stores and authorized distributors
- Global platforms such as Amazon, Gearbest and AliExpress
- Physical stores selling technology and electronics
It is common for there to be additional discounts During Black Friday events, seasonal promotions, or multi-buy bundles, it's recommended to check that the model you purchased is the global version to ensure language compatibility and notification support in your region.
User reviews, community, and expert ratings on the Xiaomi Mi Band 4
La user satisfaction It is one of the great endorsements of the Mi Band 4. Thousands of opinions and ratings in stores and forums especially highlight:
- Comfort of use, both to wear all day and during sleep.
- Reliability in activity and health monitoring, adjusted to expectations for a wearable in its price range.
- Outstanding autonomy, which allows you to forget about charging it for weeks.
- Ease of customization and synchronization with popular sports or health apps.
- Frequent software updates and a proactive community that generates spheres, apps and tutorials.
Investing in a Mi Band 4 is profitable in the medium and long term thanks to its robustness, compatibility, and support, both from Xiaomi and the global community of users.
Have you tried the Xiaomi Mi Band 4 yet? Do you have questions about any of its features or how it compares to other models? Share your experience and answer any questions in the comments section to help more users choose and get the most out of the wearable.
The Xiaomi Mi Band 4 continues to mark a before and after in the world of wearables thanks to its impressive balance between Functionality, autonomy, customization and affordable priceWhether you're an athlete, a professional, or simply looking for a tool to improve your daily well-being, this smartband is the ideal ally for monitoring your activity, staying motivated, and receiving notifications without complications or high costs.