The camera image of 0-5 seconds ago is played back in real time.
You can better yourself by observing you.
There is no storage function, so there is no need to worry about data being shared or uploaded.
How is your appearance?
How about the form when playing sports?
Want to check the dance poses without continuing to look in the mirror?
Do you want to check where the eyes are hard to reach?
Do you want to rewind the screen in a moment?