Plain tap water powers this unique, H20 desk calculator! Add a few drops of water to the removable battery and insert it in the calculator for up to three months of use. When the display begins to fade, just refill the battery! It’s more reliable than a solar-powered calculator – and friendlier to the earth, too.
Here’s the specs.
- Eco-friendly new battery can be re-energized by addition of water again and again
- Battery can be stored in a dry state indefinitely, and activated when needed
- Ergonomic design
- Rectangle shape
- Large LCD display
- 12-digit display for home, school or professional use
- Large easy to use buttons
- Buttons measure approx 3/8-inch square
- Includes standard adding machine functions such as memory + or -, last digit correction, rounding, automatic decimal, etc.
- Two non-slip feet on bottom of calculator
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