This unit is ideal for Mathematic Calculations, Trigonometry, Statistics, Science, Computer math, and Algebraic 1 & 2 functions. Easy to read clear function keys combined with the assistance of a step-by-step instruction manual to make learning scientific calculations almost painless. In addition to the convenience of a two line display, the unit features a conventional battery power source backed up by a build-in ''fail-safe'' solar panel. No lost data.