The choice of calculators everywhere seem overwhelming but when you really don't need anything too complicated this is a great buy. It has two non-slip feet on the bottom which stops it moving whilst using it and it has a large clear display (8x2.4cm approx) with the figures shown in black against a pale green/grey screen. The screen slopes upwards towards you which makes it even easier to see when it is flat on a desk.
The calculator works on both solar power and a 1.5v battery (LR54), the battery is included. I have not had to change the battery yet. I think it works on solar power most of the time I am using it. I very rarely remember to turn it off and luckily it has an automatic power-off function.
The keys are really quite large and very easy to use, because of the size it is not easy to hit the wrong key by accident which I have managed many times with smaller keys on the scientific type calculators or the little tiny ones designed to be carried around. The keys also seem to stay amazingly clean, they are very smooth to the touch and just do not seem to attract the dirt from your fingers like computer keys do!
The calculator performs the major basic functions: addition (extra big key), subtraction, multiplication and division. It also has a percentage key, a square root key and positive and negative number key. It also incorporates a 4-key memory function which I don't think I have ever used.
This seems to be a very robust calculator. It has been knocked on the floor or buried under piles of paper and still reappears working perfectly. Due to its size (10x15cm) it tends not to get lost and sits on my desk whenever it is needed. It feels solid but is not particularly heavy. I would recommend it to anyone looking for a handy desk-top calculator.