The Deli Professional Scientific Calculator D991EX is a premium-grade calculator designed for students, engineers, scientists, and professionals who demand accuracy, speed, and reliability. Built with a large multi-line display and intuitive keypad layout, this scientific calculator simplifies complex calculations while delivering precise results every time.

Powered for advanced mathematics, physics, engineering, and statistics, the Deli D991EX supports functions such as:

• Trigonometry (sin, cos, tan and inverses)

• Exponents, logarithms, and powers

• Fractions and decimal conversions

• Permutations & combinations

• Statistical analysis (mean, standard deviation)

• Equation solving and scientific notation

Its user-friendly menu, clear labeling, and durable design make it ideal for JHS, SHS, College, and University students, as well as professionals in technical fields. Light enough to carry daily and rugged enough for classroom or field use, this calculator is a dependable tool throughout your academic and professional journey.

Whether you’re preparing for exams like WASSCE, BECE, GRE, SAT, or professional assessments, the Deli Professional Scientific Calculator D991EX helps you perform complex calculations with confidence.