This digital microscope connects to your PC or smart-phone via USB. Its magnification is continuously adjustable from 25X to 400X. It has built-in illumination with 8 LEDs that surround the lens. The resolution is limited only by the screen on the device it is attached to. It comes with an adjustable and steady stand, a detailed manual and a CD with the necessary drivers for up to Windows 7 32 and later drivers are available online. Ideal for examining small items in great detail.