Steripen adventurer opti portable uv water purifier blackgreen product details the adventureropti uses a revolutionary optical eye to sense the water the patent pending technology ensures safe use and provides purification in even the coldest of waters when camping backpacking and hiking if you wont have access to the power grid for several days a time adventurer opti is the product for you specifications weight grams 108 dimensions 61in 155cm l x 15in 33cmw x 1in 22cm