Angled SuperView display for easy viewing</br>Solar and Battery powered to work anywhere</br>Change sign (+/-) key simplifies entry of negative numbers</br>Easy keyboard operation</br>Change sign (+ / -) key</br>Square root key</br>Solar and battery powered</br>Angled display</br></br>Product Description</br></br>The classic mini-desktop calculator for home?? office?? or retail with big keys and a giant SuperView display. <br><br> Key Features: <li>Well-spaced keyboard with large?? contoured keys for easy operation</li> <li>Change sign (+/-) key simplifies entry of negative numbers</li> <li>Square root key is useful for schoolwork</li> <li>Solar and battery powered to work anywhere</li> <li>Angled display for easy viewing</li></br><br/>http://www.amazon.com/gp/product/B00000JBLU