Feature: 1. [Large Round Keys] This calculator features large, round keys that provide a comfortable and smooth typing experience, reducing the risk of errors during calculations. 2. [Mechanical Keyboard] The mechanical keyboard design offers a tactile response for each keypress, which enhances the accuracy and speed of your calculations. 3. [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. 4. [Battery Powered] Powered by 1x AAA battery (not included), this calculator is energy efficient and provides long-lasting operation. 5. [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. Specification: Color: Gradient Green, Gradient Orange, Gradient multicolor, Gradient blue, Gradient red, Gradient purple (Optional) Size: 14x10.5cm Main Material: ABS Battery: 1xAAA (not included) Package List: 1 x Calculator