Compared with traditional battery-powered calculators, our calculator comes with a Type-C charging cable, eliminating the need for frequent battery replacements. After a 150-minute charge, it can be used for approximately 240 to 300 minutes, depending on usage. It features a solar panel, ensuring reliable power performance and preventing unexpected power loss. The calculator can also support continuous operation for a period even when the battery is depleted.Have you ever experienced the inconvenience of not having a pen and paper to record calculation steps? This financial calculator includes an integrated LCD writing tablet that allows you to jot down notes and track your calculations without the need for additional tools.The compact design features high-quality ABS keys that provide a comfortable feel and quiet operation, minimizing disturbance in quiet environments. The "lock" key function helps protect important notes from accidental deletion. Designed for efficiency, it supports various financial calculations including mortgage, loan, tax conversion, and basic arithmetic functions.Constructed from durable ABS material, this portable desktop calculator is ideal for school, office, or home use. Suitable for students, accountants, and professionals, it combines practical calculation capabilities with note-taking functionality. Thoughtfully designed and presented in a gift-ready box, it makes a great gift for any occasion.Material: ABS Color: Black Package Contents: 1 x Scientific Calculator Note: Light reflection and differences in display screens may cause slight variations in color between the image and the actual product. Measurement may vary by +/- 1-3 cm.