Rebell RE-SC2040 BX 12 Digit Scientific Calculator Black RE-SC2040 BX 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.