Let the SteriPEN ultraviolet purifier with pre-filter be your single source for potable water on your next traveling or backpacking adventure. Features: - Ultraviolet (UV-C) light rays safely sterilize clear water by destroying viruses, bacteria and protozoa including Giardia and Cryptosporidium - But if clear water is not available, no worriesthe Hydro Photon Pre-Filter clears particulates and debris from water - Pre-filter fits Nalgene and other water bottles with 63mm wide-mouth openings; pour source water through filter, and clean water enters bottle then use the SteriPEN purifier to treat the water; just press a button and gently agitate the water with a quick stir - Purifies 16 fl. oz. of water (cold or warm) in less than a minute or 32 fl. oz. in a minute and a half - Small size fits most containersuse it in cups, mugs, water bottles and canteens - SteriPEN turns itself off once ultraviolet treatment is complete; can be used up to 5,000 times! - Watertight seals keep water away from the electronics; rubberized inset grips for secure handling in wet conditions - Low-power indicator lets you know when batteries need replacing; twist-off cap for easy battery access - Four alkaline AA batteries purify 20 to 40 16 fl. oz. glasses of water; purify 200 glasses with lithium AA batteries (batteries sold separately) - Average weight is 8 oz. with alkaline batteries and 6.4 oz. with lithium batteries; weight empty is 3.7 ounces - Only use SteriPEN independent of pre-filter when clear water is available, as cloudy, sediment-laden water hinders effectiveness - Pre-filter screen has a square aperture equal to 17 square microns - Includes SteriPEN purifier, pre-filter, carrying case and instruction manuals

SteriPEN # SPPF-RP