Product Name: biological microscope TV Head: monocular observation tube 45 ° tilt Magnification: 1600X/2500X Stage: tablet square platform Light source: Adjustable LED point light source Focusing structure: Focusing stroke: 20mm Thermostatic temperature control: room temperature to 38 degrees Heating area: the entire stage (120mmX120mm) Body color: white If you choose Model Number: 1600X You will get Magnification: 1600X Constant temperature stage: Yes 7 inch LCD Screen And there are two tubes on this model, one for the LCD and the other one for eyepiece. If you choose Model Number: 2500X You will get Magnification: 40X to 2500X Constant temperature stage: Yes 7 inch LCD Screen Microscope Mechanical Stage Aluminium alloy case And there are two tubes on this model, one for the LCD and the other one for eyepiece. If you have any questions, please contact us and we will have the opportunity to answer you.