It has the functions of lighting, intimidation, alarm and high-pressure self-defense. 
The multi-function flashlight has the function of high-voltage self-defense and acts synchronously with the alarm sound. If the gangster wants to use the high-voltage function of the multi-purpose flashlight to commit a crime, it will issue a loud alarm, which will undoubtedly set the gangster on fire, thus restricting the gangster's attempt to buy a multi-purpose flashlight to commit a crime. 
For good people, with a multi-functional flashlight, no matter day or night, walking in rugged mountains or other places, when they encounter ferocious beasts or gangsters, they can issue an alarm in advance to scare them away. If wild animals or gangsters attack or rob good people regardless of the alarm sound, good people can use high pressure to attack wild animals or gangsters to achieve personal self-defense. At the same time, the loud alarm sound will also call the surrounding rescue workers. 
In order to prevent the bad guys from buying back the multi-function flashlight, the alarm part is removed, leaving only the high-voltage part to commit the crime.