Interchangeable Lenses : Switch effortlessly between 5 lenses (1.0X, 1.5X, 2.0X, 2.5X, 3.5X) for diverse applications. Hands-free Magnification : Focus on your work with both hands free, ideal for jewelry work and other detailed tasks. Comfortable Head-mounted Design : Stay comfortable throughout your workday with the adjustable elastic headband and rubber nose-pads. Adjustable Light and Lens Angle : Customize your lighting and viewing angle for maximum efficiency. LED Light Illumination : Two bright LEDs provide ample light, powered by 3 AAA batteries (included). Crafted for perfectionists, this professional loupe is your ally in conquering the finest details. Whether you're a jeweler, watchmaker, or simply someone who appreciates the art of precision, this tool is indispensable.