Mechanical CalculatorThe mechanical keys are used in a similar way to a mechanical keyboard, providing fast and accurate response. A distinct click sound is heard with each press, providing a pleasant and addictive experience. Large LCD DisplayThe desktop calculator has a large 12digit display, 4 inches, which makes calculations and readings clearly visible from all angles and very convenient and comfortable. The display is also designed with a 15° tilt for optimal visibility and stability, effectively reducing reading fatigue. Ergonomic DesignThe office calculator has a typewriterlike design with clean lines. Retro rounded keys fit easily in your hands to prevent fatigue. Springloaded ergonomic design takes care of your wrists. Made of durable ABS material, it feels good in the hand and is lightweight, suitable for both desktop and handheld use. Energy Efficient & NonSlipThis cute calculator is powered by a AAA battery (not included) and automatically turns off after 10 minutes or more of inactivity, saving energy and power. Equipped with 4 nonslip pads to provide extra friction and stability on a variety of surfaces for quick typing and calculations. Versatile UseThe calculator is not only powerful, but also highly portable, making it the perfect tool to quickly meet your daily calculation needs in a variety of environments such as schools, offices, homes, stores and more. It is also ideal for students, teachers, colleagues and anyone else who needs a reliable calculator.