The iCalculator looks like your favorite gadget, with a design reminiscent of today’s most popular and familiar phone style. This accessory is sleek black which easily complements the rainbow of twenty-five bright, bold keys that lay flat on the keyboard so it’s easier to maneuver and clean. iCalculator is eco-friendly, getting its power from the sun in order to operate. Its automatic on/off function saves the battery life of one AG10 battery (included).