Operation: 1.Sure the eyepiece and diaphragm get ready then put a microscope slides on the stage.Beginning with the 4X Objective. Turn on the LED Illumination. 2.Turn the focusing knob until a clear image is obtained (First you need to find the object image with the coarse focusing,then adjust the object image to the clearest with the fine focusing). 3.When desired view is obtained under the lowest power (4X), rotate nosepiece to next higher magnification 10X/40X .To sum up using LED Illumination and coarse & fine focusing make the image clearest. ESSLNB 40X-1000X Biological Microscope All-Mental LED Student Biological Compound Microscope with Plain Stage Abbe Condenser Slides Phone Adapter It comes with full optical glass elements, metal framework, 360 degree rotatable monocular head, coarse & fine focusing, and upper and lower LED illumination.3 DIN achromatic full-glass objectives in metal barrels provide high resolution images. Multi-coated highly transparent optical glass with eyepieces WF 10X,WF 25X, it offers 40X, 100X, 250X, 400X and 1000X magnifications.It is not only a suitable microscope for students from elementary to high school, but it is also for hobbyists. Three aberration-correcting glass DIN objective lenses (4X, 10X, and 40X) paired with two wide-field glass eyepieces (10X and 25X) offer sharp images without edge blur. The monocular head is fixed at an ergonomic 45 degree angle to prevent neck-strain Precision coaxial focusing knobs on both sides of the metal arm allow you to make minute adjustments easily. This dual-light microscope purposes as both a Incident and transmitted LED microscope for viewing larger objects or small, translucent specimens Abbe condenser collects the light and focus it on the light cone to illuminate the specimen with uniform intensity throughout the field of view Objective Lens 4X,10X,40X DIN achromatic full-glass objectives in metal barrels that provide high-resolution color-corrected imagesOur objectives is all made of metal, no like others' plastic objectives. The metal is a big cost, so many factories use plastic in order to save cost at the expense of clarity. Dual LED Lights Upper and lower LED illumination with adjustable brightnessIncident and transmitted LED light sources allow for the viewing of opaque objects lit from above and the viewing of translucent specimens lit from below. N.A=0.65 Abbe Condenser with 6-hole Iris Diaphragm Better lighting conditions and brighter field to illuminate specimensMake the aberration get the maximum correctionImprove the resolution of objective lens Reduce the intensity of the incident light without changing other properties of the incident light Coaxial Coarse and Fine Adjustment It offers precise location for sharp and clear images.Coaxial coarse & fine focus knobs on both sidesThe coaxial positioning makes you not to move your hand much when focusing the microscope. Metal Objectives Upper and Lower LED Illumination Iris Diaphragm Coaxial Coarse and Fine Adjustment 40X-1000X Compound Beginner Microscope with Rotating Monocular Head, All Glass Optics, Carrying Handle, Cordless Capability, and Dual Illumination Package List 1x Monocular microscope 1x WF 10X /WF 25X Eyepiece 1x A Set of slides 1x Phone adapter 1x Power adapter 1x Dust cover 1x Instruction Manual Specification Head: 45 degree inclined monocular Eyepiece: WF10X & 25X Objectives: 4X, 10X, 40X(S) Stage:Plain(Double layer stage with clips)Focus: Coaxial coarse and fine adjustmentCondenser:N.A=0.65 Abbe condenser & 6-hole Iris diaphragmIllumination: LED Power Supply: AC Input 110V,DC ouput 6V Affordable Quality Microscope for Students,Kids and Beginners Our microscope is more solid and durable than divided-body type microscope. 45 Degree Inclined 360 Degree Swiveling Monocular Head Double Layer Plain Stage with Clips and Stain Resistant FinishFully Coated Optical SystemHigh Resolution Offering Sharp ImagesFive Levels of Magnification: 40X, 100X, 250X, 400X and 1000XN.A=0.65 Abbe Condenser and Disc Diaphragm Focusing Control Knobs on Both SidesUpper and Lower LED IlluminationAll Metal Mechanical ComponentsSolid Metal Frame with Stain Resistant Finish Abundant Accessories Universal Sucker Phone Adapter Biological microscope with smartphone adapter, you could record the beauty and acquire the knowledge in the microworld better.Cultivate love of science 2 Kinds of Power Supplies You can choose any power supplies according to your needs.You needn't worry there is no electrical socket outlet outside and can use batteries instead.You can take this microscope anywhere you want without worrying about power. A Set of Slides Prepared Slides and Blank SlidesTen CoverslipsSlides help you explore the fantastic microbial world. 40X-640X Microscope 40X-2000X Microscope 40X-2000X Microscope 40X-2000X Microscope 40X-1000X Microscope Eyepieces 10X and 16X 10X and 20X 10X and 20X 10X and 20X 10X and 25X Objectives 4X, 10X, 40X 4X, 10X, 40X, 100X 4X, 10X, 40X, 100X 4X, 10X, 40X, 100X 4X, 10X, 40X Magnifications 40X, 64X, 100X, 160X, 400X, 640X 40X, 80X, 100X, 200X, 400X, 800X, 1000X, 2000X 40X, 80X, 100X, 200X, 400X, 800X, 1000X, 2000X 40X, 80X, 100X, 200X, 400X, 800X, 1000X, 2000X 40X, 100X, 250X, 400X, 1000X