This personal alarm may be secured to a belt or clothing with the included belt clip or attached to a purse with the included lanyard. When the safety pin is removed, a loud 130 decibel alarm will sound. The ear piecing alarm will sound for up to 2 continuous hours. Its compact size makes it great for home or travel, with an unbreakable plastic shell and small size. Measures 3 inches x 2 and one-eighths inches x 1 and one-eighths inches. This alarm is perfect for keeping yourself and your property safe. Covered under a year warranty. Requires one 9 volt battery (not included).