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Self Defense Keychain Alarm 130dB
Pull out the small bolt on the alarm buttock, then the device will immediately send out an alarm of 130 decibels (sound range 1 kilometer), scaring the ill-intentioned and warning the people nearby
It can be used also you need immediate help to warn people who you are not able to call to, because too far or any other reason
Useful also for children
Principle:
The primary role of this device is to scare ill-intentioned. As long as people are doing bad things, they are psychologically weak, so when a high-decibel alarm sounds suddenly, the first reaction is running away from you, and then followed by the attention of the people around to get help