Featuring a user-friendly display Ultra is rechargeable via a computer, outlet or portable solar panel. Ultra’s UV lamp treats up to 8,000 one-liter treatments and is proven to be safe and effective, eliminating over 99.9% of bacteria, viruses and protozoa that cause water-borne illness. -Ultra features an internal battery that’s recharged from any USB power source; connect the included USB cable and start charging from a solar panel, laptop or car power port -Low-power indicator lets you know when battery needs recharging; when fully charged you can treat 50L
