Feature: 1. Microscopy kits encourage scientific discovery and finding, introducing a key scientific tool in an interesting way. 2. Magnification 640X suitable for beginner compound microscopes provide high magnification for educational applications. 3. Microscopes encourage children to be interested in scientific exploration and discovery, rather than being tired of learning, or indulging in television, mobile games, etc. 4. Super educational toys include all the specimens that children need to be introduced into science and begin to dissect. 5. Microscope student biological microscope, more joy with friends, exercise ability. Specification: Item Type: MicroscopeMaterial: Steel Microscope Size: Length: Approx. 33.8cm / 13.3in Width: Approx.19.8cm / 7.8inSize: Approx. 33.8 x 19.8cm / 13.3 x 7.8in (H x W)(measured by hand, for reference only) Use: This series of biological microscopes are used by various medical institutions, laboratories, research institutes, universities and other departments for general biology and bacteriology research, clinical trials and demonstration in teaching. Choose different magnification objective lenses and different magnification eyepieces. Get different total magnifications. Its maximum magnification is 500 times and 640 times respectively Use: 1. Put the specimen slices on the worktable and press them tightly with the slice press. 2. Put each magnification objective lens into the objective lens converter in sequence, and insert the eyepiece into the eyepiece lens. 3. When observing, first use a low-power objective to find the object to be observed, then move the observed object to the center of the field of view, and then turn to a high-power objective for observation. 4. When focusing, generally use the coarse focusing knob to adjust the objective lens until the outline of the specimen can be seen, and then use the fine focusing knob to adjust until the object image is clearest. When using a high-magnification objective lens, it is best to adjust from bottom to top, so as to avoid the lens from being damaged by touching the section. 5. Rotate the reflector to make the illuminating light enter the lens barrel to obtain a bright vision, and then adjust the aperture size of the light to obtain the clearest object image.. Package List: 1 x Microscope 1 x Storage Box2 x Eyepiece3 x Objective Lens1 x Mirror