Desk Calculator, 12-Digit Solar Battery Office Calculator with Large LCD Display Big Sensitive Button, Dual Power Desktop Calculators

This is one odd and funky calculator. It has a useful form factor: large raised buttons and tilted, easy-to-read screen.There is no instruction manual -- just a slip of paper with a few examples and button descriptions that do not match the actual device The buttons do match Amazon's description; the labelling does not. (I got a JOINUS version).The M+, M-, MC and MR buttons are standard, but there is an "MU" button described as "mark-up/mark-down key; I have no idea what this is supposed to do.The right-arrow, CE and EX keys take some getting used to. There is a GT button which one would think might mean Grand Total, but its function seems random and completely mysterious.There is no on/off key. The AC key turns the machine on and functions as an ALL CLEAR, but watch out: this button clears memory too (not standard -- only the MC key should do that).They do not include a battery, as stated in the description; however, it only takes one AA which I would expect to last for years. Without a battery the solar cell will run the calculator in fairly dim light; whether this supplements an installed battery is not clear.I'm not sending it back, but had I checked the picture more closely I probably would have ordered one with a more conventional keypad

I once had a dual-powered desk calculator that required a tiny Phillips screwdriver to remove six tiny screws to replace the battery. And the battery was an uncommon type.This unit comes without a battery. Imagine my surprise when I discovered that it takes a common (triple-A) battery (that's in the description -- Duh!), and that the battery is easily installed and replaced, without removing any screws.So I like this machine. The only downside is that it's awkward to pick up with my (smallish) hands. But I'm getting used to it.

Nice sized keys and angled top makes easy quick usage when you are working in your office. I am a simple. old school guy who likes to be streamlined and efficient and not waste time & money on the next fad gadget, and this calculator is perfect for that !

I had one of these at work before and had to find another. I love how clear it is and simple to use. It does the job without buttons getting stuck. My favorite

This calculator had some good reviews, but I ordered 2 of them. Neither one worked at all! When I took them out of the box, they had numbers on the readout; but when I cleared that and put a battery in - Nothing! I tried different batteries; but I couldn't get them to work. I returned them.