This is a microscope that is the successor to the STV-450M. The compatible OS has been changed and the 64-bit Windows 7. A microscope that connects to a computer to observe videos captured by a microscope on a PC monitor. Everyone can enjoy where they cannot be seen with the naked eye. You can also remove the barrel only from the body and use it as a handheld mini microscope. Uses two types of light source lamps that illuminate objects from the bottom and reflective LED light that illuminates objects from the top. Microscope Specifications: Optical Zoom: 2x Optical Magnification: 50-100x 100x 100x 100x 100x 200x 200x 200x 200x 200x 200x 200x Weight: Approx. 11.8 oz (320 g) (excluding accessories).