Celestron Digital Microscope Imager HD 5MP, Black (44422) Simple, rugged aluminum housed 5MP CMOS sensor Replaces the eyepiece on your traditional microscope. Turns any existing traditional microscope with 23 mm or 30 mm eyepiece diameters into a digital microscope Takes high resolution still images and 30 fps video USB powered - Connects to your personal computer via open USB port Software included - Works with both Mac and Windows PCs More robust software with new features like measurement, calibration, note taking and comparison feature which allows comparing 2 live streams