Is there no sound normal in DJI Elf 4 Yuntai photography?

If you look at the original video taken by our plane, there is no sound; If you are viewing a cached video on a mobile device, the sound of the video comes from the microphone of the mobile device.

After entering the picture transfer interface, you can click Settings, General Settings in the upper right corner to open the cached video and record it at the same time.

Warm reminder: After the recording is turned on, it will be recorded through the mobile device, and the aircraft itself does not have the recording function.