Description. Steripen Ultra(TM) UV water purifier is our flagship model with our most advanced user interface featuring a user-friendly OLED display (Organic Light Emitting Diode). Effect: Eliminates bacteria, protozoa and viruses. Treatment size: A 1/2 or 1 liter. Treatment time: 48 or 90 seconds. Features Internal 2,200mAh li-ion polymer battery can be recharged from any USB power source; connect the included USB cable and start charging from a solar panel, laptop or car Low-power indicator lets you know when battery needs recharging; when fully charged you can treat up to 50 liters Ultraviolet (UV-C) light rays safely purify clear water by destroying 99.99% of protozoa (including Giardia and Cryptosporidia), bacteria and even viruses UV-C purification protects you from risks that cause botulism, cholera, dysentery and typhoid, just to name a few To purify your water, just click a button and gently agitate the water Purifies 16 fl.oz. (0.5L) of water (cold or warm) in less than a minute or treat 32 fl. oz. (1L) in 90 seconds Designed to fit perfectly into store-bought bottles of water: just insert the Steripen Ultra&&';;s lamp into the bottle and flip the bottle upside down to start treating the water Small size fits most containers-use it in cups, mugs, water bottles and canteens Steripen Ultra turns itself off once ultraviolet treatment is complete; can be used up to 8,000 times! Watertight seals keep water away from the electronics; rubberized grips provide secure handling in wet conditions Long used by municipal water districts and bottling companies, UV-C light treats water safely Use only on clear water, as cloudy, sediment-laden water hinders effectiveness; FitsAll prefilter (sold separately) clears particulates and debris from water Includes Katadyn Steripen Ultra water purifier, USB cable, carrying case and user instructions Imported. Technical Specs Best Use Backpacking Filter Type Ultraviolet Filter Medium Ultraviolet light Removes/Destroys Protozoa, Bacteria and Viruses Pump Force Not applicable Pump Strokes Per Liter Not applicable Output 32 fl. oz. per 90 sec. Housing Material Not applicable BPA Free Yes Field Cleanable Yes Dimensions 7.3 x 1.6 x 1.3 inches Rechargeability Rechargeable Liters Treated Per Set of Batteries or Charge 50L Weight With integrated battery: 4.94 ounces