lenses: 75mm, 19mm; Magnification: 5X (large objective); 11 X (small lens); Material = ABS, acrylic optical lens. Superb 5X (500) and 11X (1100%) magnification power for more detailed tasks. our distortion-free professional-grade lenses. With foldable, height-adjustable stand: Compact and stylish design, portable weight, easy to operate, 3 movable joints ensure the stand can be stretched to any height as you need when used as a desktop magnifier. With a comfortable ergonomic handle suitable for children, adults, seniors, amateurs and professionals. Lighting: 8 LED lights ensure an evenly lit viewing area. (3 AAA batteries not included) for grinding, welding and cutting, good quality leather.Brightness can be adjusted to make the working environment more comfortable, improve work efficiency, effectively protect vision and prevent eyestrain . USB and Battery Power - You can connect your computer, laptop or mobile power (without the USB charger) via USB cable. It can also be powered by 3 AAA batteries (battery not included). Pocket or desktop magnifier: The magnifier can be used as a desktop magnifier by stretching its stand and placing it on the table. It can also be folded like a handheld magnifier for a wider range of applications.