"Enjoy safe drinking water in just 48 seconds on your next outdoor adventure with the Steripen Ultra UV Water Purifier. This easy-to-use purifier eliminates over 99.9% of bacteria, viruses and protozoa that cause water-borne illnesses. 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. UV lamp automatically shuts off when the treatment is finished. Dependable design lets it last for up to 8,000 treatments. 7.3""L x 1.6""W x 1.3""H. Weight: 4.9 oz.Manufacturer model #: ULT-MP-EF. Compact, handheld UV water purifier designed specifically for outdoor/travel use Destroys 99.9 percent of harmful microorganisms, including Giardia, bacteria, viruses, and protozoa Treats .5L in 48 seconds, or 1L in 90 seconds Fast, safe, effective and chemical-free to purify up to 8,000L Includes USB charging cord and neoprene carry case"