We've taken the same great features of the original Pocket Fluorescent light and added the magic of ultra violet black light. Because ultra violet light has a wave length shorter than visible light, it can pick up things the naked eye is not able to see. It causes certain substances (like inks) to either glow or change their color. Some of its uses are: detecting counterfeit currency, the identification of fraudulent art, and screening patrons at rock concerts and sporting events. Battery operated, this lightweight lantern is small enough to fit in your pocket. It can also be carried with the convenient wrist strap. Designed to stand in a vertical or horizontal position, it can also be wall mounted with the convenient hang tab. Requires 4 AA batteries (not included) Color: Black Dimensions: 50 x 165 x 19 mm