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When facing criminals or satyr threat, the small size of the anti- satyr alarm can not be quickly find out from the bag , and the opportunity to use it can be missed easily. We combine the anti- satyr alarm with insoles and design a " Anti- satyr insole ".When facing emergency situation, deliberately stomp on the heel position of Anti- satyr insole three times and a high-decibel alarm sound will be sent to deter criminals.