pendancy Desktop Calculator Extra Large 5in LCD Display 12-Digit Big Button Giant Accounting Calculator, Battery & Solar Powered, for Office Business & Home(OS-6815)

Love the non slip and size. Makes one handed calculations easy.

Pour mes travaux de comptabilité

Low cost but useable calculator. It has some useful functions like stringing multiple calculations together (i.e. AxB+C) and facilitating calculation of a long string of numbers that need to be added/subtracted, etc. large, easy to read digits. Large raised keys are easy to press and are far enough apart so it is unlikely I will inadvertently press two at a time. While it does have some photocells, I think you would need a bright area to actually get enough power to operate the calculator. I keep my office lights less bright so they don't interfere with my computer monitor. Fortunately the unit has a compartment for a single AA battery which powers the unit if the light is insufficient for the photo cells to provide enough power.

great, big numbers easy to use

I liked the fact that it was almost identical to the Sharp model I was used to and it was dual power, battery and solar, but the plus key quit working after only being used a few times.