Description EL-W550XG-SL Sharp scientific school calculator. Solar-powered with backup battery. General data: Display: WriteView with DAL input. Power supply: Two-Way-Power, solar cell + battery (LR44). Comes with hard case. Size (HxWxD): 14 x 168.0 x 80.0 mm. Weight: 110 g. Functions: Distribution functions (normal distribution and inverse normal distribution, binomial distribution, Poisson distribution), value tables for functions, calculation of factorials, binomial coefficients, means and standard deviations of a population, calculation of individual and cumulative probabilities, particularly for binomial and normal distributions, simplifying radical expressions through partial root extraction, metric conversions, 52 physical constants, integer random numbers, periodic decimals, calculations with fractions (especially simplification), variable storage (9), trigonometric and inverse trigonometric functions, hyperbolic and inverse hyperbolic functions, exponential functions, inverse functions, power and root functions, logarithmic functions, combinatorics and permutations, conversion of polar coordinates to rectangular coordinates and vice versa, number systems: hexadecimal, binary, octal, decimal, calculations in grads, old degrees, and radians, statistics.