1）place the sample on a flat surface.
2) Manually install the microscope, object lens toward the surface.
3) Whithout enough light, turn on the LED light sucre.
4) Look into the object lens to watch the sample.
5) If the image is not clearly, rotate the Focal Length button untill identify clearly.
6) Contrarotate lossing the cover of battery, take off and chenge the the battery.It can be used after clockwise rotation the battery.
有问题还可以再问.