Water Powered Calculator
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Unscrew the top and fill with ordinary tap water, wait a few minutes and the calculator will become usable. The calculator will only need topping up on average once a month, and offers a full range of functions. Size: 120 mm x 85mm x 150 mm

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This product's categories
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Power Source
Water Powered Battery -
Main Categories
Home, Computers & Accessories, Office -
Environmental Factors
Saves Energy, Water and Resources, Low Energy -
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Gadgets -
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