Feature: 1. 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 head 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. 3. The switch operation is very simple. Turn the battery cover 40 degrees clockwise from the small circle to the light symbols. At this time, the LED light source is turned on, counterclockwise reversed, and the light source is turned off. 4. 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 popup, then take out the 3 old LR1130 batteries and replace them with the 3 batteries of this model (not included) with the battery negative electrode facing up. Specification: Condition: 100 Brand New Item Type: Head Loupe Material: Plastic, Optical Resin Lens Color: Black Lens Magnification: 10x 15x 20x 25x Battery: 6 x LR1130 Button Battery (Not Included) Lighting Source: 2 LED Lights Product Size: Unfolded: Approx. 210 x 140 x 58mm 8.3 x 5.5 x 2.3in Folded: Approx. 85 x 155 x 55mm 3.3 x 6.1 x 2.2in Applies to: Read newspapers, documents, maps Repair electronic parts, jewelry, clocks and mobile phones Jewelry identification, miniature carving, etc. Package List: 1 x Magnifying Glass Frame (with 2 x 25x lens barrel) 2 x 10x Lens Barrel 2 x 15x Lens Barrel 2 x 20x Lens Barrel 1 x Headband 1 x Manual Ingredientsdefault See moreHE POSITION OF THE LENS BARREL CAN BE ADJUSTED: The position of the magnifying glass lens barrel can be adjusted, and it can be moved horizontally on the bracket by 5mm 0.2in according to the width of the face and the distance between the frame. ASY TO USE: The bracket and the headband are interchangeable, and the headband is added, so the magnifying glass will not slip off easily even if the working time is long. 4 MAGNIFICATION MAGNIFICATIONS CAN BE USED: The glasses magnifier can be equipped with 10x, 15x, 20x, 25x lenses, and choose the appropriate magnification lens according to the size of the object to be observed. AFE AND DURABLE: These magnifiers are made of high-quality plastic optical resin lens, safe and odorless, environmentally friendly and durable, and can be used for a long time. LENS TUBE BOX: Equipped with a lens tube storage box, which can be used to store the lens tube, save space, and help protect the mirror surface, reduce wear and keep the mirror surface clean.