The Texas Instruments TI-1726 desktop calculator is very easy to use thanks to the extra large SuperView display. This display is tilted upwards, making it easy to read the numbers on the screen. With this calculator it is also possible to use the square root key and also enter negative numbers with the 'sign-invert' key. In addition to batteries, this desk calculator is also equipped with solar cells, so you can use it anywhere. This compact calculator is an essential item on your desk.