[Large Keys] This calculator features large, square keys that provide a comfortable and smooth typing experience, reducing the risk of errors during calculations. [Mechanical Keyboard] The mechanical keyboard design offers a tactile response for each keypress, which enhances the accuracy and speed of your calculations. [12-Digit Display] With its clear 12-digit display, you can perform large calculations easily, making it an ideal tool for office work, accounting or student use. [Dual Power Sources] This scientific calculator operates on dual power sources - solar and 1 battery (included in the package), ensuring continuous and reliable power supply for your calculations. [Versatile Use] Whether it's for office work, accounting tasks or student homework, this calculator is designed to cater to a wide range of numerical computation needs, offering professional-grade reliability. Battery: 1 ( included) Color: Pink Material: plastic Package Contents: 1 * Calculator Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.