Solar Powered Solar powered makes the desktop calculator always keep working, and the calculator will shut down automatically with the auto power-off function.^ Large LCD DisplaySpecially designed with large LCD display and tilted screen, which allows accurate screen reading and clear display, also ensure easy-to-read numbers for maximum viewing comfort.^ Big Sensitive ButtonBlack panel and white button helps you recognize numbers and operational character quickly and conveniently, also the ergonomic big button gives a comfortable touch and good sensitivity performance.^ 12 Digit Numbers12 digits make the basic calculator useful for large calculations, suitable for perfect for office, school, market or home use that needs make any sort of calculation.^ Premium QualityOur desktop calculator is made of high-quality ABS material and well constructed. Durable and sturdy to use for a long time.