The small size makes the calculator easy to carry with you; It has clear numbers, comfortable buttons, non-slip and dirt-resistant. It can offer a practical calculator that can meet your learning needs because it has many mathematical symbols and supports 8-bit arithmetic. It is made of high-quality plastic and LCD material. The length of this mini calculator is 8 cm. 5.4 cm. This calculator is suitable for home, classroom, office and school. Power supply: 1 x built-in button battery Size details: Size: 8.5 cm x 5.4 cm / 3.35 " Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.