CT-500 is a 12-digit calculator i.e. it can post the numbers123456789012 or any other 12 digit.It has an AC key. Which is located in the left side at thebottom of the display. The calculator switches on with the help of this key.When we push this key 0 will appear on the display.
The display of CT-500 islarge, clear & easy to read even in sunlight. It has both lithium-Lonbattery & sunlight. I have been using my CT-500 calculator for last 3 years& it is still working.
It has a “check” & a “correct key”. It means that what we have done in previous we can see that with the help of check key. If we findan error on the display we can delete the error & correct it with the help of correct key. These keys are in light blue color, located in the right side just bottom of display. The check function works backward as much as 100 steps.
It also consist an “Auto Replay” function key, which is used to see the replay on the display about what we have done. The difference between “Check” & “Auto Replay” that we have to press key again & again to see our previous work in “check” function key while in the “Auto Replay”function key we need not to press it again & again, once push it, it will work automatically like a slideshow on the display.
I bought it because of its large keys & its industrial strength. It is most trusted calculator in themarket. Its keys are easy to type numbers & it also performs calculationvery fast. The keys are very soft & also have a tactile feel; because ofthis we can press the keys very easily & softly. We can press the keys zillion times & it won’t break still. It can be bought at everywhere like the roadside shop, the stationary shop, staples. We can procure a piece without a warranty for Rs.150-200. What price we pay, it depends no our bargaining power.