LS - Calculator. The LS-100KB pocket calculator is a versatile, 10-digit device that covers all basic functions. This user-friendly calculator features dual power, meaning it operates both on solar energy and batteries. It has a total sum memory housed in a sleek case, and the selection of vibrant colors allows users to express their personality. Its design incorporates recycled plastic and a plant-based biopolymer called NuPlastiQ, made from renewable materials, making it an environmentally friendly choice. The calculator does not have a display cover, which reduces plastic usage in the casing. The reduced plastic consumption includes plant-based materials. Dual power supply ensures you can always use the calculator. Large 10-digit display. Tax calculation function.