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Now to the review on this novelty.
The packaging for me was damaged even after revision 3 versions, as it turned out to be a huge rectangular shape. This is certainly not a minus, but for me it is not pleasant. In the box, we see:
• Instruction (in Chinese);
• The bracelet itself (very surprised that the strap from the 3rd version of the MI Band is suitable for the 4th);
• Charger of course blundered here and made extremely unpleasant.
Bracelet
The most important advantage of the Mi Band 4 is undoubtedly its large bright 1 ”AMOLED display. With this innovation, the company was able to fix the biggest problem of its trackers, poor visibility in the bright sun, i.e. If before people wanted to wear smart electronics on their hands, but did not want to spend big money on Apple and Samsung devices with their decent visibility in the sun, they bought Amazfit Bip, now they can do without Mi Band 4.
Bracelet strap and capsule
The strap is the same as it was from the first version - hypoallergenic pleasant to the touch material. The capsule of the bracelet sits in it like a glove, about the same as it was in the third generation. The capsule itself is slightly modified compared with the previous generation. If in the third it was round like a drop, then in the fourth it became as close as possible to the second generation of the bracelet, a nice flat surface with 2.5D rounding around the edges.
Functionality
As I wrote earlier, the screen has become larger and brighter, now much more information will get in here, but besides this, now you can switch music directly and change the volume directly from the screen. With the release of four versions of the bracelet, it became possible to install a custom WatchFace. Also in the bracelet, there are new training regimes: swimming and training in the gym. How accurate they are, I cannot say, because I do not use these functions, but considering the fact that previous versions of bracelets did not cope well with this functionality, I think the fourth MI Band will not fail this year either.
As for the smart alarm clock and counting the number of steps.
He considers the steps as all previous versions, but the clever awakening never returned this sad fact with which it seems like it will have to be reconciled. If you still want to return the whole thing, then take a closer look towards paid applications. In the application, the Xiaomi team added vibration drawing, i.e. you go into the alarm clocks and draw tapas on the screen as you like, so that your bracelet vibrates.
Battery
The device worked for me for 9 days and lost 47% of the charge. I have included all notifications, measured about 5-6 times. By the way, heart rate measurements at the same level as in the previous version differ from a stationary heart rate monitor by a couple of points.