Mechanical Button: This calculator is designed to mimic mechanical keys, which are comfortable and sensitive, with a strong tapping sensation that brings pleasure every time you use it. Clearly Visible LCD Display: The calculator features a 10-digit digital display that can be placed on a desktop and is compact in size, so it 't take up too much space and is easy to use. 15 Design: 15 design of the display, large and clear screen, and scientific and reasonable layout, to improve the comfort of use, to avoid fatigue caused by prolonged use. High Quality: Transparent body, , and wear-. Warm tips: the calculator uses 1 x AAA battery, this product does not include the battery. Color: Blue 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.