SteriPEN purifies water using Ultraviolet (UV) light. Whether your source is a clear running brook or a hotel tap, SteriPEN destroys viruses, bacteria and protozoa–including Giardia and Cryptosporidium in seconds.

SteriPEN creates ultrviolet light that destroys the DNA of microbes n seconds. Without DNA, microbes can't reproduces or make you sick. This kind of ultraviolet light can not escape from the water so it is perfectly safe for you.

SteriPEN™ specifications: Weight: 3.7 oz. without batteries. (6.5 - 8 oz. with batteries, depending on type) Dimensions: 7.6" (L) X 1.5" (W) X 1.5" (H) Battery: 4 disposable or externally rechargeable AA batteries.