Don't let the small size of this unit fool you! The MINI PERSONAL ALARM with CLIP might be small, but this alarm emits an ear shattering 101 decibel alarm that will send any attacker running! With the click of a button, this alarm can be easily activated or dectivated. Small enough to carry in your pocket or purse and comes with a belt clip and a keychain. So, however you want to carry this unit, you will always feel secure knowing it's there. Includes three AG13 batteries.