Large LCD Screen The calculator features a 12-digit large display screen of 4 inches, allowing for clear viewing of calculations and readings from any Angle, which is very convenient and comfortable. The display screen is also designed with a 15 tilt to achieve the best visibility and stability, effectively reducing reading fatigue. Energy-saving and Anti-slip This cute calculator operates on a single AAA battery (not included) and automatically shuts down after 10 minutes or more of inactivity, thus saving energy and electricity. Equipped with 4 anti-slip pad rims, it can provide additional friction and stability on various surfaces for quick pressing and calculation. Mechanical Switch Calculator The usage of mechanical switch buttons is similar to that of mechanical keyboards, providing quick and precise responses. Each press will produce a unique click sound, providing a pleasant and addictive experience. Ergonomic Design The desktop calculator adopts a typewriter-style design with simple lines. The retro circular buttons can be easily held in the hand to prevent fatigue. The ergonomic design with spring loading protects your wrist. Made of durable ABS material, it has a good hand feel and is lightweight, suitable for both desktop and handheld use.The multi-purpose calculator is not only powerful but also highly portable, making it the perfect tool to quickly meet daily calculation needs in various environments such as schools, offices, homes, and stores. It is also an ideal choice for students, teachers, colleagues and anyone else who needs a reliable calculator.