Electronic calculator in a plastic case with aluminum overlay has 16-digits LCD display with acrylic cover and tilt stand. Has a double memory key. Optimal set of calculating functions allows to perform basic mathematical operations, calculate percentages, retail margin, extract the square root, summarize the operations performed and memorize the intermediate result. Convenient keyboard is equipped with buttons of "00" zero and backspace key. Has both rounding-off selector and decimal point selector. Solar power element can be charged both from direct sunlight and office ceiling lights, helping to save a charge of an alkaline battery. Power supply of a calculator turns off automatically if the device is not used for 7 minutes.