Compact handheld ultraviolet light (UV) water purifier designed specifically for outdoor/expedition use. -Reusable for up to 8,000 liters. Weighs only 3.8 ounces with batteries. Measures 6.1 x 1.3 x .9 inch. Water sensor doubles as an LED flashlight. International products have separate terms, are sold from abroad and may differ from local products, including fit, age ratings, and language of product, labeling or instructions.