Steripen Water Purifier's Adventurer Opti UV

The Steripen Adventurer Opti UV water disinfector is indispensable for all adventurers and has a patent-pending technology: an optical sensor that tests the water to ensure safe use and effective cleaning.The revolutionary optical water sensor also serves as an integrated LED flashlight for added comfort on the go or on the campsite: hold down the activation button for three seconds to provide light in the dark.If you don't have access to the power grid for several days while camping, backpacking and mountaineering, this is the water purification system for you.Treatment volume: 1/2 or 1 litreDuration of treatment: 48 or 90 secondsLamp life: 8000 activationsBatteries: 2 x CR 123 (50 liters per battery pack), '1 x UV Water Purifier,instructions,guarantee,2 x CR123 batteries'