30X Optische Glaslinse 6 LED Vollmetall Klapplupenlupe Lupenbrille Fadenzähler
Batterien：4x LR927 Batterien（Batterien nicht enthalten）. Product multiplying rate: 30X standard. If a convex lens is placed in front of the eyes, this problem can be solved. But when the object is too close to the eye, it can not see clearly.