1、Install the left and right LED magnifying goggles on the glasses bracket, each goggles is equipped with 8 different magnification lens barrels, you can choose the appropriate magnification lens according to the size of the object to be observed. If you use this magnifying glass for a long time, the two lens barrels can be used alternately to relieve visual fatigue and improve work efficiency. 2、The LED lamp holder is designed separately from the battery compartment of the control switch, which can prevent the illumination point of the light source from being changed when the switch is operated, and there is no need to recalibrate the illumination point during repeated use. The switch operation is very simple. Turn the battery cover 40 degrees clockwise from the small circle to the light symbol. At this time, the LED light source is turned on, counterclockwise reversed, and the light source is turned off. It is very convenient to replace the battery. Press and hold the switch battery cover and rotate it counterclockwise about 30 degrees, the switch battery cover will automatically pop up, then take out the 3 old LR1130 batteries and replace them with the 3 batteries of this model with the battery negative electrode facing up. 3、The bracket and the headband are interchangeable. The general bracket type eye cover magnifier. When in use, because the LED light source on the eye cover is relatively heavy, it is easy to slip off during work. This product adds an interchangeable headband. After replacing the headband, It is a good solution to this problem, even if the working hours are long, the eye cover will not slip off easily. 4、The position of the lens barrel can be adjusted horizontally by 5mm on the bracket. It can be adjusted according to the width of the face and the distance between the eyes to adapt to the center of the eye cover. 5、The eye cover can be rotated up and down 180 degrees on the bracket, so that the entire frame does not need to be removed when the magnifying glass is not needed temporarily, so as to facilitate reuse. Equipped with a lens barrel storage box, which can be used to store the lens barrel, save space, and help protect the surface of the lens, reduce wear, and protect the lens from cleaning. Item Type: Headband Magnifier Material: ABS, Optical resin lens Color: BlackLens Magnification: 2.5X, 4X, 6X, 8X, 10X, 15X, 20X, 25X Lens Focal Length: 259mm, 125mm, 90mm, 69mm, 46mm, 37mm, 25mm, 21mm Battery: 6 x LR1130 button batteries (Included) Battery Capacity: 65mAh x 6 Lighting Source: 2 x LED lights Expanded Product Size: Approx. 210x150x60mm/8.3x5.9x2.4in Application: Reading Newspapers, Documents, Maps; Repairing Electronic Parts, Jewelry, Clocks, Mobile phones; Beauty: Tattoo and eyelashes; DIY; jewelry identification, micro-engraving, etc. 1 x Magnifying Glass Frame 1 x Headband 2 x 2.5X Lens 2 x 4X Lens 2 x 6X Lens 2 x 8X Lens 2 x 10X Lens 2 x 15X Lens 2 x 20X Lens 2 x 25X Lens 1 x Manual