"The Steripen Adventurer Opti UV Water Purifier delivers water filtration in an innovative, potentially lifesaving device small enough to fit in your pocket. This compact, patent-pending water filtration system purifies water with a rate of 1L in 90 seconds using UV light, destroying over 99.9% of viruses and bacteria. Up to 50 liters of water can be purified on a single charge with 2 CR123 batteries (included), and the Steripen Adventurer Opti UV Water Purifier promises reliable filtration up to 8,000 treatments. Suitable for hikes, travel, or any situation when pure, drinkable water is not available, this water treatment device uses no chemicals, and won't change the taste or color of the water or add an unpleasant smell. Simply press the on button, place the lamp in your water bottle and stir. The lamp automatically shuts off when the treatment is finished. The Steripen Adventurer Opti UV Water Purifier also includes a neoprene case with belt loop and user's guide. 6.1"" x 1.5"" x 1"". 3.8 oz. Manufacturer model #: ADO-MP-EF. Compact water filtration system Patent-Pending purification technology Purifies drinking water using UV light Destroys over 99.9% of viruses and bacteria Purifies at a rate of .5L in 48 seconds or 1L in 90 seconds Reusable for up to 8,000 liters Includes neoprene case with belt loop and user's guide"