This is a small device that I have long coveted, and that I found on Amazon, being handyman, of any material, given my age (58 years), still with glasses or a magnifying glass in hand, it was only not always easy, with this little gem is a blow merveille.du whole family uses it, me for my craft, my wife grains for these beauties, and my little son, hugged him all day (insects pebbles shining, flowers ..... magnification 400 is more than enough for this kind of chose.appareil at unbeatable price at amazon and super express delivery (3 days) unheard of among competitors. I put 5 stars to this device as it is worth it for my needs, so do not make it a scientific apparatus, but he could surprise a lot of people. I therefore advise those who do not want months as a scientific apparatus.