... microscope usb New 4 LED 200X digital microscope usb Instructions:First, insert USB interface. Second, install ... , adjust rotation, to the appropriate focus (left to right, are 200X 10X is). Sixth, the save picture for (JPG or BMP ... LED x 4 (have ON/OFF function)Magnification Ratio: 20X ~ 200X (Manual) Power Supply: USB Port (5V DC) Software Compatibility: TWAIN ...