Interchangeable Clarity Lenses: Upgraded headband magnifier provides higher magnification 1.5x, 2.5x, 3.5x, 5x. Depending on the magnification you require, the lenses are interchangeable. Acrylic optical glasses are made of high-quality materials and are durable, waterproof, and scratch-resistant. USB charging interface: Compared with bulky magnifiers powered by 3A batteries, this head magnifier has an obvious advantage: it is lightweight. You don't need to worry about wearing it for a long time. Multiple USB power sources: wall charger, phone/laptop charger or power bank (not included). You'll be amazed at how quickly it charges and how long it lasts. ADJUSTABLE BRIGHTNESS LEVELS: The magnifying glass with LED light also features two brightness levels. You can easily turn the light on or off with a switch. Press once, bass; step into the light again. One more light and the light goes out. The illuminated magnifying glass provides enough brightness in any dim or dim environment to accurately illuminate the surface of the object being observed. Save money and energy while enjoying long-lasting bright light. Comfortable headband: Equipped with elastic straps and anti-slip design to release head pressure. These hands-free loupe glasses feature an ergonomic frame with soft padding on the forehead for long periods of eye work. No need to readjust light position, brightness, lens when you move to another place. Even so, it's a good idea to give your eyes a break to relieve eye strain. Great for close-up projects: As a very convenient accessory, the headband magnifying glass is ideal for close-up work such as reading, sewing, painting, model making, welding, repair, hobbies, crafts, inspection, jewelry and can be applied to all those who need to magnify small objects Precision procedures. If you have any questions during use, please feel free to contact us.