120 dB Personal Safety Alarm Keychain Security Anti-theft Alarm

Note When the alarm sound goes low, please remove screws from back cover and replace new batteries. This item is not completely waterproof, please not put it in the water and make it in a dry condition as possible. Alarm function: - Pull out the pin. It will alarm and the sound will be louder and louder. The alarm sound will last 40-60 minutes. - Insert pin back in to stop sound and use again. - The pin won't come out very easily. - The alarm sound is loud enough to draw attention for assistance, difficult to ignore