Discover the OPTO-EDU A33.5100 7" LCD 640x Video Microscopio Usb Digital Heating Stage Biological Microscope, featuring a 7" LCD monitor and digital camera for easy use. Ideal for viewing blood and sperm with a heating stage adjustable from 30° to 50°. Offers 40x~640x optical magnification and 200x~2000x digital magnification on screen.