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For many years I was a user of the now old Xiaomi Mi Band 2 bracelet. The third version of this bracelet did not appeal to me, so I decided to wait to see what Xiaomi comes up with next. And the "next time" that was just prayed for arrived a few weeks ago with the name Mi Band 4. It recently arrived in our editorial office and I haven't taken it off my hands since then to properly test it and be able to evaluate it in a review. So let's take a look at how the Mi Band 4 impressed the owners of the older generation of Mi Bands and especially fitness bracelet lovers.

Package contents and pairing

The fitness bracelet will arrive in a box containing the Xiaomi Mi Band 4, a rubber bracelet, a manual and a charging cradle, the cable of which, in my opinion, could definitely be longer. To pair with a smartphoneonem needs to be downloaded from App Store or Google Play Mi Fit application, and you need to have at least Android 4.4 or iOS 9. The app will ask you which device you want to pair. After selecting the bracelet, you need to place it near your phone to start the pairing process. The connection itself takes a few seconds.

Specifications

Now briefly to the technical parameters. The bracelet weighs only 22,1 grams and, according to the manufacturer, it is possible to dive with it to a depth of 50 meters. However, Xiaomi measured this value in laboratory conditions, so it must be taken into account that in real life the water resistance is significantly worse. However, if you do not do deep dives with it, but "just" swim or dive to a depth of several meters, you will not have a problem.

Bluetooth 5.0 is used to connect the phone, which guarantees a very stable connection and is also gentle on the battery. The bracelet has a color AMOLED display with a resolution of 240 x 120 pixels. The brightness is up to 450 nits. The battery capacity has increased to 135 mAh compared to previous versions, mainly due to the energy consumption of the display. Depending on your use, it is not a problem to get by with a single charge for the classic 20 days. The bracelet charges from 0 to 100% in approximately 2 hours. If we focus on the sensors, we will find a three-axis accelerometer, a three-axis gyroscope and an optical heart rate sensor. The Chinese version will also include NFC, which will not be applicable to us.

Application

The Mi Fit app is one of the best I've seen on similar devices. It is completely in Czech and very user-friendly. You can register through a social network, then you need to choose your gender, height and weight. You can see the battery status in the app, you can set the notifications you want to display on the bracelet, night mode, bracelet visibility, automatic heart rate measurement, sports data, etc. In short, you will find here everything you would expect from a bracelet app in this price range. Moreover, in a pleasant and clear environment.

Appearance

The appearance of the bracelet is not much different from the previous version. Proof of this can be the fact that the bracelets of the previous version of the Mi Band 3 are compatible with the Mi Band 4. The change has occurred mainly in the display. It is now colorful, flatter and about 40% larger. The brightness level is definitely worth praising. You can adjust it directly on the bracelet and at the highest level there will be no problem with readability even in direct sunlight, which was widely criticized for the previous versions. The viewing angles are also absolutely fine. ProThere is no problem with the device's reaction to raising the arm, as the bracelet always lights up reliably thanks to high-quality sensors.

The charging cradle, in which the bracelet is now placed, has undergone changes. Personally, I have to say that I liked the previous "snap-on" solution more. On the first try, I had trouble removing the device from the cradle and was worried about damaging it. However, I believe it's just a matter of habit. The material of the rubber bracelet is identical to the previous versions. So you will get the classic black one, but there are many bracelets available, of course in different colors.

A pleasant novelty is the possibility to choose different dials. There are less than fifty in the menu in the application, and I believe that everyone will choose. At the same time, Xiaomi promised on its website that the number of dials will increase. Another great new feature is the ability to control music. Just swipe the wristband to the side to access the music player controls, where you can skip tracks or change the volume level. At the same time, you can also see the name of the song being played.

Control

The bracelet itself is very pleasant and intuitive to use. You can move between the bars by swiping up or down. You confirm your selection by “tapping” the display. You can then go back by pressing the virtual button below the display. The bracelet has the Status folders, in which you can find data on steps taken and calories burned, Weather, Heart rate monitor, Workout, in which you can select the sport you want. You can choose from trainer, exercise, outdoor running, cycling, walking and swimming. There is also the Notifications and More folders, in which you can find options to set alarm, stopwatch, countdown, watch faces or also the function to find the device. Notifications, similar to the previous version, do not display diacritics. But we will certainly soon see full Czech localization created by the community. Notifications are displayed on the display very reliably, in the folder you can also look at those that you did not display at a given moment for some reason. I would like to scold the bracelet for not displaying the number and name of the caller, which is meaningless to me. However, in this case, I believe that Xiaomi itself will fix the problem in one of its regular updates. You can answer the call on the bracelet or switch to vibration.

 

Personal experience

As part of the testing, I of course mainly tried the activities offered. When running, the bracelet informs you about the duration of the exercise, the total distance covered, the average pace per kilometer and your heart rate. If you don't have a phone with GPS with you, the distances are simply approximate. This has to be taken into account. However, if you finish, nestI don't think the values ​​surprised you in any way and you said to yourself that you definitely couldn't have run that much. In my opinion, the heart rate measurement works reliably. When I measured my heart rate after the activity for guidance (number of beats per 10 seconds x 6), the values ​​were identical to those indicated by the bracelet. Then I tried the classic weight training activity. Here, in addition to the time spent exercising and heart rate, the bracelet also informs you about the calories burned, which is a value that is really very subjective for everyone and I wouldn't take it too seriously. Its calculation corresponds to the weight and height values ​​you provided when registering in the application. Of course, everyone burns at a different pace. But swimming is probably the most sophisticated. You choose the length of the pool and go swimming. The bracelet will inform you about the length swum, the average pace per 100 meters, the calories burned, the number of "pools" swum or your preferred style. If you're interested in your sleep, you can set up sleep monitoring in the app. The graph in the app shows you your deep and light sleep levels, including your heart rate during the night. However, if you turn this feature off, you'll get a few more days of battery life on a single charge.

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záver

I am really excited about the Xiaomi Mi Band 4. The fact that I have been a long-time fan of this series also plays a role in my assessment. The range of wearable accessories is getting wider and wider. But if you want a smart fitness bracelet with a high-quality and readable display, long battery life and the ability to control music, the Mi Band 4 is for you. You will not go wrong by buying it in this price range.

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