➤ PROFESSIONAL GRADE CALCULATORS. Easily handles 1 and 2 variable statistical calculations, three angle modes (degrees, radians, and grads), and scientific, engineering notation modes. ➤ BRILLIANT DESIGN. Measure: 5.25" x 3" x 0.5". Comes with PP slide on cover to protect keyboard and screen from scratching. Reasonable configuration and comfortable. ➤ SCIENTIFIC 10+2 DIGITS. HD display. Support natural logarithm, trigonometric, inverse trigonometric function key. Feature common logarithm / anti-logarithm & hexadecimal number key. ➤ LONG LASTING POWER. Powered by battery. Battery included. The calculator will function even in a dim place. The soft rubber button design in line with the use of human habits, comfortable for touch. ➤ VERSATILE. Performs various science math functions. Perfect for high school and college math. Great for business, students, use at home, office, and on the go.