Description About this item Compact handheld UV water purifier designed specifically for outdoor/expedition use; Reusable for up to 8,000 liters Destroys more than 99.9 percent of harmful microorganisms, including Giardia, bacteria, viruses, and protozoa Safe and effective without altering taste, pH, or other properties of water; chemical-free UV lamp can be used as an LED flashlight; weighs 3.6 ounces; measures 1.5 by 6.1 by 1 inches Comes with two disposable CR123 batteries and a neoprene case with belt loop