The EL-520XTBBK performs over 419 advanced Scientific functions and utilizes a 2-line Display and Multi-Line Playback to make Scientific equations easier for students to solve

It is ideal for students studying general math, algebra, geometry, trigonometry, and calculus

In addition, it can be used for statistics, biology, chemistry, and physics

Direct Algebraic Logic - allows students to enter the elements of an expression in the exact order they appear in the textbook

Extra Large Display - 12 digit, 2 line Display - 1 line equation and 1 line numeric

Multi-Line "Playback" - after getting an answer the user may then "playback" the expressions and substitute new numeric values

Additional Features - include differential and integral Calculus functions, 419 functions, and hard case

Replacement batteries 357BP