Go anywhere with SteriPEN's smallest and first rechargeable UV water purifier. Freedom's integrated battery recharges via a micro USB port. Providing 8,000 0.5 L (16 oz.) treatments, the germicidal UV light destroys over 99.9% of bacteria, viruses and protozoa (giardia and cryptosporidium) in 48 seconds. Includes built-in LED flashlight. Wt: 2.6 oz.