Unscrew the “antenna” 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. 

The water powered products are the most uniquely powered products on the market as all the components of the water battery are environmentally friendly.

Every year billions of conventional dry cell batteries are used, and the recycling of such waste is not only expensive but often incomplete, resulting in hazardous pollution and damage to our environment.

By just adding water you are providing your product with an endless source of energy, never needing conventional batteries again!

Size: 12 cm x 8.5cm x 1.5cm