The SteriPEN Classic Safe Water System includes the SteriPEN Classic, the Water Bottle Pre-Filter and a Nalgene® BPA-Free wide-mouth water bottle. The 40x40 micron screen Pre-Filter fits snugly on the wide-mouth water bottle, protecting the drinking threads, and allows clear water to flow into the bottle while removing particulates. Ships with neoprene case for the Classic and User's Guide. Weight (grams) 646 Dimensions 7.6" (L) X 1.5" (W) X 1.5"|(H) Battery Type AA Lithium, Not Included Battery Life Lithium Disposable: 200 treatments (16oz./0.5L), NiMH: 200 treatments; Alkaline & NiCd not recommended. UV Lamp Life 8,000 Treatments Minimum Bottle Diameter 20mm (0.8 inches) Filter Compatibility Tapered End (PreFilter and FitsAll) User Guides No