USB digital microscope,Image sensor: 1.3 M(interpolated to 2M),Magnification Ratio: ... : 1600x1200, 1280x960, 1024x768, 800x600, 640x480, 352x288, 320x240, 160x120Focus Range: Manual focus from 10mm to 500mmFrame Rate: Max 30f/s under 600 ... chatting Teacher Add as Project Presentation USB-130x400 usb digital microscope