Magnification Ratio: 1500X - 3000X. Material: Metal. Theory: Biological Microscope. Function 2: camera microscope. Function 4: LED Light HD microscope. Features: High Definition Drawtube: Trinocular Eyepiece: WF10X, WF1 6X,W25X Function 1: electron microscope Function 3: usb microscope Function 5: video microscope Function 7: endoscope Function 8: Cell microscope Function 10: microscope slides You can place the test item on the board for close observation