Whats in the box? Out of the box you get a band, a charging deck and a guide.
Hows the display & visibility on sunlight? The screen resolution is good so as the touch sensitivity, precise sense to even the smallest buttons for the music player. Visibility in sunlight is fair & readable at the maximum brightness but could be better.
How's battery backup? Well it's been 10 days since the 1st full charge and have 52% still remaing, (everyday I've took heart beat check at least 5 times, turned on the notification for the whole day with notification access throughout the day)
How many watch faces, is there unlimited watch face? For the time being NO.For watch faces at present you'll get only 53 online watch faces from Mi fit app and you can set the background picture of your own for the 3 custom text design.(The unlimited watch face has yet to released in our versions)
Accuracy of step count & heart rate monitoring? For a small distance step count, the accuracy is good with only just 2-3 steps been missing, the distance calculated is of good. The heart beat count takes less than 30 seconds to measure and yields an accurate result for almost all the time.
What about the music control? I love the music control, just swipe from left to right from the main watch face and the control is up, you don't have to go through all those menus to get to the control. Which is amazing. But it takes 2 seconds to sync the currently playing music details to be displayed, but the controls works instantly. The only issue is that I have issues getting the volume control along the sides correct in the first go as they're comparatively small in size to the screen.
Any new features besides the old Mi band 3? Yes, 1.The lift to light the screen feature is good, it does works all the time when you raise your arm. 2. So as the auto lock feature in which your band gets locked automatically with password when removed from you fist. 3. The step counts are more accurate even when the arm lift, maybe using the accelerator and gyroscope for accurate counts. 4.Unlike many other this actually has a mute & call rejection function, which is cool.
About notifications? For notification only text notifications are supported, no emojis. Swipe left/right for next notification, up/down to scroll down more details. Also you have complete control on which app's notification and silent the notifications for the time schedule.
Is that all? Other features include exercise modes,do not disturb, stopwatch, timer, weather updates & alarms. We can only switch On/off alarms which was previously set on phone but cannot set one with the band.