Hello, I put 5 stars because this was the competent air, unfortunately I had to return it. The concern is not the level of quality or other goods, but that this product does not have it in French and did not agree to prof. for occurs even in French, you have bought the calculator Texas Instruments- TI82-stats.fr is the same model only the color changes and it is the same one calculator translated into French. Unfortunately this is not clear on the site that's why I actually by that of another student is not found annoying as I was. Because I can return and take the French model also provided for amazon do not harm. By cons I wishes to clarify the seriousness of amazon who has understood the problem and immediately took charge back in charge and reimburse goods. Once again despite the small hardware incompatibility concerns order, thank amazon who has demonstrated professionalism and speed to solve my problem. Regards Sandrine