This is a pocket high-definition high-power magnifying glass to observe the internal features (inclusions) and external features of gemstones, such as the acid-etched texture of jadeite B).Instructions: The light source switch will not turn on when the magnifying glass is opened at an angle less than 150 degrees, and the light source switch is automatically turned on when the angle is greater than 150 degrees. Rotate the lens out of the housing (when the light is insufficient, turn on the LED light switch), place it above the object to be observed, hold the magnifying glass, make the lens parallel to the line of sight (the distance imaging is clear and the maximum multiple is best), and move the identified object Time to find the most suitable observation position.Product attribute Material: PU leather, plastic, metal, acrylic optical lens Light source: LED Color: Black Magnification: 4 times Type: Portable magnifying glassWarm reminder 1. Please remember that due to the lighting effects, the monitor's brightness / contrast settings / etc's, there will be some slight differences in the color of the pictures and the actual items. Measured by hand, deviations of 1-2 cm are possible. 2. Please leave us a message if you have any questions. We will respond and offer you our best service.