JVR&reg; TL47 USB Digital Microscope with Base Stand, 50X-500X Magnification Optical Zoom, 8 LED Illumination, Software CD Calibration Ruler Included, Compatible with Windows XP/Vista/2000/2003/Win7/Win8 JVR TL47 500x Digital Microscope has a still image capture resolution up to 1600 x 1200 and a video image capture resolution of up to 640 x 480. The magnification ratio is equivalent to 50x - 500x. The sensor is augmented by a variable brightness 8 LED illuminator and outputs to your computer via a USB 2.0 cable. The USB cable has a light dimmer (thumb-wheel) Capture software: the interface is simple and intuitive, with icons for photo (JPEG) and video (AVI) capture. Compatible with Windows XP/ Vista / 2000 / 2003 / Win 7 and 8. Two red buttons on each side of the microphone are for zoom and snap function. A calibration ruler included to adjust magnification level JVR microscope requires it to be plugged into a computer USB port in order to function. Easy to use: just install the software, plug the USB cable in to your computer, it lights up, then you turn the big knobs on the side for rough focus and the little knob in front to fine tune focus Come with a weighted (and quite solid) base with two strong slide clips, to which a metal vertical rod positions the camera holder. The holder holds the monocular microscope and allows for direct-contact placement up to approximately 2.25 inches off base. It has a rough focus adjustment and locking wheel. The microscope sits in the stand's O-ring and has a fine focus adjustment wheel TL47 is useful for someone interested in taking a closer look at nature, jewelry makers, electronics, stamps, coins, paper money, plants, insects, rocks and minerals etc. It also could work as a teaching aid, for doing delicate work on small objects, for exploring nature, for real-time video demonstrations, for cataloging collections of small objects