Sad to say, there are pickpockets in many of the great cities of the world. Probably, you’ll not run into them, but if it happens, you’ll be glad to have this little device at hand. Activate the alarm, and chances are would-be assailants will scatter like leaves on an autumn day. At 120 decibels, the alarm is guaranteed to get attention. A convenient clip attaches easily to purses, belt loop, backpack or bag, so it’s handy in the event of an emergency. To activate, slide up the side button---it’s just like turning on a flashlight. Batteries are included. 4 x 2 x ½ in.