CASIO Super Popular Scientific Function Calculator fx-999CNCW Black for Physics Chemistry Biology Competitions High School College Exams Graduate Entrance Math Accounting Study

12 built-in applications with 7 new social calculation functions and 2 new ear applications

Independent function control keys separate from applications for enhanced usability

Supports derivative (d/dx), integral, and other calculus operations

Angle and coordinate conversions (degrees, minutes, seconds)

Precise value and decimal one-key conversion with conversion menu

Algebraic form (a+bt) and polar coordinate form (r∠θ) conversions

EXE key for execution and conversion operations

Solar powered with backup LR44 button battery (1 piece included)

CASIO fx-999CNCWII calculator x1 (pre-installed battery)

Instruction manual x1

Warranty card x1

Designed specifically for Chinese users with enhanced user interface and experience

Supports function tables, equations, inequalities, matrices, vectors, and data tables

Reliable and durable build quality

Official product with unique anti-counterfeit code ("one product, one code") on packaging for authenticity verification

Random shipment of new or previous generation models due to product upgrades

The product supports participation in official CASIO surveys with chances to win CASIO watches or calculators

Anti-counterfeit codes are unique and can be scanned up to 4 times for verification