Gadgets Collection GC30 30X Illuminated LED Pocket Microscope Magnifying Glass Jewelry Loupe It includes a soft carrying case & a focusing wheel to adjust to the sharpest vision The sliding light condenser is for transmitting light onto the object The transparent cover is to be placed directly on the part of the object that is being viewed It measures approximately 5 7/16" x 1 13/16" (138 x 41 mm) long Works on 2 AA batteries (not included)