华为手环4和4e：两个一起用也没什么问题

There are already some significant differences in the exteriors of both trackers. While Band 4e offers a simply designed monochrome display with a button on the bottom edge, the Band 4 has a full-area color touch display with manual brightness control and a large selection of alternative watch faces. Its comfortably soft Silicone band - available optionally in black, pink, or red - ensures a tight fit around the wrist, which is important for the optical heart rate sensor. 

The latter is missing in the Band 4e, and the designers from Huawei have opted for a completely different design. The tracker is worn loosely around the wrist, held by an adjustable, elastic band made from recycled materials. The box also includes a clip to fasten it to your shoe. Since only the shoe clip has two contacts, the tracker is able to change into shoe-mode automatically, if you enable automatic recognition. In addition to the band and shoe clip, the Band 4e also includes a charger with a standard USB connection. 

Huawei has integrated the charger cleverly into the Band 4. It appears when you open the band on one side of the tracker case, and you can then directly plug it into a corresponding USB charger (not included).

All the trackers of the Huawei Band-4 series offer a sensor key at the bottom of the display for operation. However, in the Band 4e, this is the only input option. The display changes when the key is tapped or alternatively when the wrist is turned. Alternately the smartphone search function and the status for the activities of the day are displayed: minutes of being stationary or intense activities, the number of steps and distance, calories used, and sleep duration. Notifications are signaled but not displayed.

The Band 4 offers more display and operation options: Using the touch display, which covers the whole front, you can move forward and backward through the displayed functions. Swiping from the left corresponds to a back button, and the Home button at the bottom of the display leads to the home screen from any other place. 

The number of notifications is already displayed inside a badge on the overview screen and you can read the full notifications on the fitness watch. However, removing them becomes an issue, since reading the notifications on the smartphone does not have any effect on the fitness band. You either have to read them again one by one, or you can delete all of them at once.  

In the announcement of the Band 4, a remote control for the camera was mentioned. However, this is missing in our test unit. Instead, the Band 4 offers a player control, which works universally with the player that is activated on the smartphone at that point. In our test, this worked with the integrated music player, as well as with Deezer, Spotify, and the Audible audio book app from Amazon. 

For indoor training, the Band 4 offers running, walking, biking, a crosstrainer, a rowing ergometer, and free training - aerobic, for example, aerobic according to the symbol. Outdoors, you can select from walking and running. If you want to capture your GPS coordinates to record your route or get a more exact analysis, you have to bring your smartphone. 

The same also goes for the Band 4e. If you fasten the tracker directly to the shoe, its 6-axis gyroscope can also offer details and analyses that the Band 4 cannot deliver: in addition to the speed and step frequency (steps per minute), the app also determines the amount of time of ground contact, the landing impact, and step pattern. You can also combine the landing impact and ground contact time in their corresponding charts, or optionally also analyze them in connection with the speed and step frequency.