Item Type: Desktop Magnifying Glass Material: Metal + Plastic Use: Can be used during maintenance, convenient for your maintenance work, can also be used for reading, LED light can facilitate reading at night Lens Size: Approx. 72mm / 2.8in Large Lens 30mm / 1.2in Medium Lens 22mm / 0.9in Small Lens Power Supply: 3pcs AAA (Not included) or directly connect to the power supply Use Steps: Directly put the article in the iron plate for magnified observation, but also can install the auxiliary clip, with the auxiliary clip on the object under the magnifying glass for observation Package List 1 x Magnifying Glass 1 x USB Cable 1 x Iron Plate 2 x Auxiliary Clip 2 x Screw 1 x Accessory 1Adopt 3pcs AAA batteries (not included) or directly connect to the power supply, the power supply is sufficient, to avoid the inconvenience caused by frequent battery replacement. 2High quality optical lens, high transparency lens, high definition imaging, display in the whole field of view. 3Includes 3X large lens, 25X medium lens, 4.5X small lens. Meeting different demands. 410pcs High brightness LED light chips, uniform light, easy to read at night, no harm to the eyes. 5Metal + plastic material, comfortable to hold, easy to use, can be used during repairing and maintenance work.