AmScope 20x-40x Stereo Boom Arm Microscope with Camera & Light 20X & 40X Two widefield magnification power settings Flexible incident light and two sets of eyepieces included Versatile sturdy all-metal boom-arm stand Widefield optics provide 6" large working distance 640x480 USB 2.0 digital camera for photos and videos on Windows and Mac, with 3rd-party software support