Handheld, scientific statistical calculator features a 10 + 2 digit display and 142 functions. Large, high-contrast LCD makes calculations easy and comfortable with a floating, scientific exponential display. Functions include chain multiplication/division, constant multiplication/division/percentage calculations, exponential, factorials, hyperbolic, logarithmic, mean, octal binary hexadecimal, square, standard deviation of population, standard deviation of sample, trigonometric, reciprocal calculations, DRG mode calculation, trigonometric calculation, coordination conversion, base-N calculation (binary, octal, decimal, dexadecimal), sum of value, permutations, combinations, linear regression, random number generation, and last-digit recall. Key functions are easy to read on the large, durable plastic keytops. Dual power source includes battery (LR-44) and solar. Calculator automatically switches off after 7 minutes of nonuse. Design includes a protective hard case.