Always carry a light like this one whenever you use the subway or go out at night. It could save your life. This pocket sized light has 9 led bulbs yet is compact enough at about 4″ to fit in your purse or pocket. It also is a discreet defensive weapon that no one will notice. Water resistant, uses three AAA batteries (supplied), made of anodized aluminum with Manhattan Shooting Excursions laser engraved.