This is a practical calculator equipped with an eco-battery. I bought it for bookkeeping study, but I rarely used it. The key characters are not faded and there is no noticeable wear, and it is in overall clean condition. Operation has been confirmed. Equipped with a "Days" button, it is convenient for calculating the daily dividend of the Japan Bookkeeping Association Level 2. This is a model also used in accounting and accounting practice. Accessories: Dedicated case (no box or instruction manual) Thank you for viewing. • Brand: CASIO • Model: AZ-26S • Accessories: Case • Power supply: Eco-battery • Functions: STUDY CAL #Bookkeeping #Accounting #Calculator