The Rebell Scientific Calculator with 2-line display is an ideal companion for a secondary school students in maths lessons. The 240 mathematical functions will make math and science calculations easier on the 12 digit long display Featuring a robust and hardwearing protective case and plastic keys, the calculator will stand up to the most heavy handed user. 9 variable memories and 240 mathematical functions 2 line LCD 12 digit screen Trigonometric and hyperbolic functions Polar and rectangular coordinates Calculates with fractions Permutation, combinational logic Two-dimensional statistics Slide on protective hard cover and durable plastic keys