An excellent way to examine live insects close up. It has a built-in 4.75x mangnifying glass in the cap and a 0-30mm metric scale molded into the base. It is absolutely harmless for the insect itself. Made for Schwegler Bird and Nature Conservation Products in England. The magnification lens is a high quality optic. This is not a cheap quality throw away product, and with proper care will provide an educational up close nature viewing opportunity for both kids and parents.