CITIZEN SDC-830 calculator, compatible with both solar and battery power (dual power). Stored at my parents' house. [Immediate purchase OK] Operation confirmed. There are some minor stains, but they are not very noticeable. Please check the images. - Brand: CITIZEN - Model: SDC-830 - Power Source: Solar/Battery - Features: Dual Power - Country of Manufacture: Taiwan - Design: With stand For those who understand that this is a long-term storage item, thank you. #Citizen #Calculator #NumericKeypad #Calculator #Retro