3 pcs Engineering Scientific Calculator, Suitable for School and Business Studies Accessories, without battery, 15*8cm POWERFUL CALCULATION FUNCTION: The calculator features a 12-digit widescreen display, with 2 lines to show input and calculation results simultaneously. It's a professional scientific calculator with 240 scientific functions. Easily handle 1 and 2 variable statistical calculations, and three angle modes (degrees, radians, and gradients), plus scientific/engineering notation modes. This smart professional scientific calculator helps you explore mathematical and scientific concepts more easily. BRIGHT COLORS: These bright colors stand out from ordinary ones; you can buy them for your children to spark their interest in learning scientific calculators, and they can meet the requirements for sharing with your children's classmates or for your own replacement, making them highly suitable for middle school students, college students, and professionals. THOUGHTFUL DESIGN: The calculator includes a retractable protective hard case that can be flipped back when not in use to prevent scratches, bumps, and dust, thus protecting the calculator and better safeguarding the screen and buttons. The buttons are made of plastic, are soft, easy to press, and the numbers are clear. This product does not include batteries. SWEET ADDITIONS FOR MORE COMPLEX CALCULATIONS: In addition to some common functions, there are other features like trigonometric, exponential, logarithmic, etc., with detailed instructions to help you master the usage of the method more comprehensively and quickly. WIDE APPLICATIONS: This functional calculator can meet the needs of most middle and high school math courses, better assisting with daily learning. It can also be used for exams and given as a gift to your children or friends; they will love it. Note: All data is measured manually, please allow a 1-3 cm error. Due to the difference in light and screen, there will be some color difference; the actual item received will prevail.