Not a fake – uses only genuine blue mechanical switches. Unlike many calculators that use cheap rubber membrane keys to imitate mechanical keys, our calculator is equipped with genuine blue mechanical switches. Each keystroke provides precise tactile feedback and a crisp click – perfect for long calculation sessions or mechanical keyboard enthusiasts. Large 12-digit LCD display. The bright, high-resolution LCD display clearly shows up to 12 digits simultaneously. This helps reduce input errors in complex calculations in the office, accounting department, or classroom. 15° ergonomic viewing angle. This calculator features a thoughtful 15° tilt design, ensuring a comfortable viewing angle. This helps reduce neck fatigue and makes daily use easier and more comfortable. Oversized keys for easy input. Large, easy-to-read keys are ideal for quick input and reduce accidental presses – perfect for adults and students. Automatic shutdown for energy saving. To simplify use, this calculator has no power switch. It automatically turns off after 10 minutes of inactivity. If you need to manually turn it on and off, this product may not be suitable for you.