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Optimal education tools realized through a design that emphasizes comfort in the hand, legibility, and usability through the pursuit of simplicity

Instantaneous key recognition and ease of operation, the result of careful attention to design details

  • 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

    The photo shows the fx-991MS 2nd edition.

  • 2 Quality Authentic quality

    Excellent quality and authentication ensure confidence and peace of mind for use in educational settings

    1Excellent quality

    CASIO has established three criteria to ensure excellent quality in the MS series.

    • 1.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.

    • 2.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.

    • 3.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.

    • Web Authenticity Check Procedure

      • STEP1
        A hologram sticker is affixed to the package.
        Please confirm the sticker.
        The photo shows the fx-991MS 2nd edition.
        Note: The example shown is a simulated QR Code.
      • STEP2
        Read the QR Code section of the hologram sticker affixed to the package with your smartphone.
      • STEP3
        Go to the QR Code link. One of the three pages below will appear.
        • Likely to be a genuine product.
        • May not be a genuine product.
        • Not a genuine product. Please do not purchase.