The revolutionary SteriPEN JourneyLCD uses universal symbols to take the guesswork out of the water purification process. Journeyís integrated LCD screen displays the userís dose selection (1/2 liter or 1 liter), battery status and countdown timer. The LCD screen also tracks the number of uses and signals when lamp usage approaches its life limit. At 10,000 cycles, lamp life for SteriPEN JourneyLCD reaches a new high (purify 1 liter 4 times a day for nearly 7 years!). Like all SteriPENs, the Journey is fast -- 48 seconds for 16 ounces. (0.5 L). Effective, and simple to use with itís innovative LCD screen. Ships with two non-rechargeable (disposable) CR123 batteries. Weight: 128g (4.5 oz.) with batteries. Dimensions: 18.6 cm (7.3 in.) in length, 4.1 cm (1.6 in.) in width, and 3.3 cm (1.3 in.) in depth.