RECHARGEABLEThis magnifier with the light is equipped with a rechargeable lithium battery and comes with a micro USB charging cable. It greatly prolongs the working time of LED light and you dont need to purchase batteries anymore! METAL MATERIALMade of solid zine alloy material with black paint finish. It's quite durable and not easy to damage. This 30x magnifier has a len of 1 inch diameter. It's a professional work magnifier. DETAIL DESIGNThe focal length is fixed to most clearly, and it doesn't require any adjustment. Just place the magnifying glass anywhere on the table, and place the object in the middle of the scale. Then you can see clear details of the item, you can move it as you need. The scaled base can also be used to measure item size. EASY TO TURN ON/OFFJust Press down the soft silicone button to turn on the 3 white lights for usual magnified observation, press again to 3 UV lights for money detector magnifier. Press the third time to turn off the light. SOFT LEATHER CASEThe magnifying glass has a mini size(2.3 x 2.1 x 2.0 inch), and a light weight(5.82 oz). It also come with a soft artificial leather case to protect the lens, also quite convenient to carry at hand and store anywhere.