Commodity coding 
Main use: repair meter repair small electric appliance
Patterns: physical photography
Size: maximum caliber 3.9 cm lens caliber 1.9 cm height 3.6 cm
Lens group: 1 sets of lenses
Method of use: first bell aligned in the direction of their eyes, and then use the eye to the top of their eyes is obscure, the top above and then put the eye at the top of the eyelids also below the eyes, gently let go can hold it. If you can't use it skillfully, you can also use it with the inch mirror steel ring.