Simple and easy to use Optimal education tools realized through a design that emphasizes comfort in the hand, legibility, and usability through the pursuit of simplicity. More comfortable in the hand! A rounded design that fits naturally in the hand and a slim body that's comfortable to hold. Attachable and detachable in any direction! Hard case that's attachable and detachable in any direction for greater ease of use. More legible! The frequently used number keys have been enlarged, and the keys are printed in an easy-to-read font. Easier to use! Highly visible, easy-to-press cursor keys and function keys. Authentic quality Excellent quality and authentication ensure confidence and peace of mind for use in educational settings. Wear-resistant printing 2,000-cycle wear testing Since these calculators are products used as educational tools for long periods of time, materials that ensure robust key durability and prevent wear or fading of key markings are used to ensure product quality. Drop-resistant body Drop testing from a height of 75 cm High product quality prevents key malfunction due to drop impact if a calculator falls to the floor from a desk in the classroom or display (LCD) or key breakage if a calculator is accidentally crushed in a schoolbag. Environmentally friendly Compliant with RoHS environmental regulations The materials used in MS series calculators comply with European RoHS environmental regulations, an international standard. The product quality reflects concern for health and the environment.