The Adventurer Opti Water Purifier uses a revolutionary optical eye to sense the water. The patent-pending technology provides safe use and the standard insulating sleeve around the UV lamp allows purification in even the coldest of waters. Fast, light, easy and effective, the provides the ultimate protection from waterborne illnesses. UV purification works as the ultraviolet energy emitted by the light is absorbed by the cells of the microbe, preventing cell enzymes from 'reading' its DNA. Without intact DNA, microbes can't reproduce to make you sick. The process is simple but effective, destroying over 99.9 percent of harmful microorganisms. Great for camping, hiking and backpacking. Easy to use 1 button operation; LED light quickly indicates when ready to purify, then place the pen like lamp in clear water and stir until indicator light turns green. Dirty water should be pre filtered until clear prior to treatment. The UV lamp provides up to 8,000 one liter treatments. Device works with containers with minimum 1.75 in. diameter opening (i.e. Nalgene wide-mouth bottles). Low power indicator lets you know when batteries need replacing. Automatic shut off when treatment is complete. Includes black neoprene case with belt loop and 2 non-rechargeable CR123 batteries and instructions.

Comes with two disposable CR123 batteries and a neoprene case with belt loop. Water sensor doubles as an LED flashlight. Safe and effective without altering taste, pH, or other properties of water; chemical-free. Destroys more than 99.9 percent of harmful microorganisms, including Giardia, bacteria, viruses and protozoa. Compact handheld UV water purifier designed specifically for outdoor/expedition use; Reusable for up to 8,000 liters.

Date First Available: April 17, 2010. Best Sellers Rank: #29,087 in Sports & Outdoors. Customer Reviews: 4.6 out of 5 stars 551 ratings 4.6 out of 5 stars. : B00M3SOJIG. Fishing Technique: ?Spinning, Casting. Sport Type: ?Camping & Hiking. Size: ?Small. Included Components: ?Water Purifier, Storage Bag. Style: ?Water Purifier. Model Year: ?2015. Part Number: ?ADO-MP-EF. Manufacturer: ?Hydro-Photon, Inc. Number of Items: ?1. Suggested Users: ?unisex-adult. Material: ?plastic. Color: ?Black/Green. Model Name: ?Steripen Adventurer Opti UV Water Purifier. Warranty Description: ?3 Year Manufacturer Warranty. Brand Name: ?SteriPen. Item Weight: ?0.2 Pounds. Item Dimensions LxWxH: ?6.1 x 0.9 x 1.3 inches. Package Weight: ?0.2 Kilograms. Item Package Dimensions L x W x H: ?8 x 4.33 x 2.13 inches.