JM 7515 20x
JM7516 40x
JM7517 60x
JM7518 100x
A. Turn on the flashlight to illuminate the objet which is being observed.
B. Rotate the wheel ('W'in the picture) till seeing a clear image from the ocular.
C. Adjust the position of the object to measure its size.
The battery for the torch: 2 AAA
The material: Aluminium