Robust?? professional grade scientific calculator</br>2-Lin display shows entry and calculated result at same time</br>Easily handles 1 and 2 variable statistical calculations</br>Three angle modes (degrees?? radians?? and grads) and scientific and engineering notation modes</br></br>Product Description</br></br>TI30XIIS Raspberry</br><br/>http://www.amazon.com/gp/product/B007HIQSEA