Adjustable Focal Length - Place the magnifier on any object to be viewed. Then, rotate the top part of the magnifier until you can clearly see the object. You can move it as needed. The scaled cardinality can also be used to measure object size. ABS Plastic Material - Made of high-quality ABS plastic with a black lacquer finish. It is quite durable and not easily damaged. This 30x magnifier has a 1.1-inch diameter lens and 3 white lights and 3 purple UV lights. This small magnifier will be a great helper at work. Wide Application - It is very small and lightweight. You can put it in your bag when you go to the suburbs or to a memorial. It is a professional work magnifier, perfect for printing, crafts, watch repairs, reading coins, jewelry, stamps, etc. Easy to Turn On/Off - Simply press down the soft silicone button to turn on the 3 white lights for regular magnified observation, press again for 3 UV lights for money detector magnifier. Press a third time to turn off the light.