EASY AND CLEAR TO READ: portable calculator with large 8-digit LCD display, clear and high visibility. DURABLE MATERIALS: Our pocket size calculator shells are made of ABS material, with silicone buttons, which give you a comfortable pressing feel, safe and durable. EASY TO CARRY: the size of the calculator is only 4.7 x 2.7 inches, which is small and lightweight, easy to store in drawer or put it in the school bag for carrying. Perfect for home, school and office using. DUAL POWER SUPPLY: electric digital calculator has dual electric drive, light energy and button battery; It can switch the power mode according to the environment, which is more durable and more Environmentally friendly . LARGE KEYS: Our Calculators has high sensitivity and quick response to the keys, which improves your work efficiency; The numbers on the keys are not easy to wear and can be applied for a long time.