This key ring acts as a personal security system that can be attached to your keys. In dangerous situations, the alarm can be activated by pulling the pin out of the plastic case. The alarm has a volume of 90 to 100 decibels which can be compared to the sound level of heavy-duty traffic or a jackhammer. In addition, the key ring is equipped with an integrated LED light that can be turned on and off by pressing a button. This practical promotional gift can be easily operated, even in stressful situations. Our Key Ring with Mini Personal Alarm comes with batteries.