DUPOTA Scientific Calculator 417 Functions 2-Line 10+2 Digits Written Display Solar Battery - Ideal for Middle High School Students and Teachers, Black (OA-991ES Plus II)

【417 Computing Functions】The scientific calculator with 417 functions for Include exponents, matrix calculations, statistics, integral, algebra, complex number calculations, standard deviation,etc.Apply to school, office or business, and more. Its practicability could meet the needs of various digital fields, and ideal for students. 【2-line Display Calculator】Featuring a 12-digit large display, this calculator scientific shows input and results together, minimizing errors. Ideal for offices and teaching, it offers clear formula display for precise math calculations. 【Dual Power Supply Design】The scientific calculator is equipped with solar panels and replaceable button batteries, dual safe uninterruptible power supplies, and has an automatic power-off function. It will automatically shut down after 8 minutes of non-use, which has the advantage of energy saving. 【Ultra-light and Portable】The scientific calculater body design is thin, ergonomic and comfortable to hold. Comes with a slide-on hard case to protect the buttons and body of the device. It's an excellent student teacher supplies. Weight: 125g; Dimensions: 165x 80 x 15mm. 【More Sensitive Key】The scientific calculate buttons are made of high-quality ABS plastic material, elastically fit the buttons, and the buttons feel comfortable.