| 摘要 |
PROBLEM TO BE SOLVED: To provide a crime-preventing buzzer for previously recognizing and avoiding danger, for example, by adding a new function to a portable article. SOLUTION: The crime-preventing buzzer for back confirmation is attached to a portable article. Concerning the crime-preventing buzzer, in which a sounding means, a power supply means and a switch are built in a main body, for example, a mirror is installed on the relevant main body. In this case, the said mirror is a convex mirror capable of confirming a wide range.
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