CASIO DF-120BM 12-Digit Calculator GT Dual Power DF120BM /GENUINE GENUINE and ORIGINAL Packing same as Pictures Extra Large display Larger display makes more data easier to read. Two-way power (Solar + Battery) Solar powered when light is sufficient, battery powered when light is insufficient. Key rollover Key operations are stored in a buffer, so nothing is lost even during high-speed input. Plastic keys Designed and engineered for easy operation.