This 10-digit, battery-powered scientific calculator is primarily used in teaching science, statistics and math. 63 functions for algebra, trigonometry, statistics, chemistry and science. Black case with hard shell sliding cover. 5 mode indicators (Stat, M, Deg, Rad, Grad). Common and natural logs, anti-logs, reciprocals, powers, roots, factorials and trig including inverse in degrees. Statistics functions, mean, standard deviation. Hand held, measures 3" wide x 5.8" long, batteries included. Texas Instruments, No Substitute.