Saw a SteriPEN Journey model in action recently. Pretty cool. Does the same thing as the other models but adds alot more user friendly information on the small LCD screen. It counts down the time you have to wait until the water is purified and gives you information on battery life, dosage, etc. A smiley face appears if your water is ready to drink...a frowny face if not. Takes some of the guesswork out. Seems like a worthwhile upgrade to the other models for the extra information given.
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