RECHARGEABLE & ADJUSTABLE LED LIGHT: This headband magnifier features 3 LED lights with detachable and adjustable illumination direction. The lighting angle can be adjusted for precise visibility. The built-in battery is removable and rechargeable via USB cable. It takes approximately four hours to fully charge, providing 6 to 8 hours of continuous LED illumination on a full charge.HIGH QUALITY OPTIVISOR LENSES: The magnifying glass includes 5 replaceable lenses and one small round auxiliary lens, all made of shatterproof, crystal clear acrylic material. These high-definition, lightweight lenses are durable and provide excellent clarity. By combining the 5 main lenses (1x, 1.5x, 2x, 2.5x, 3.5x) with the fixed 8x round lens, users can achieve multiple magnification levels for various close-up tasks.DOUBLE LENS SLOT DESIGN: This hands-free magnifying headset features two lens slots and a fixed front 8x round lens. One or two optivisor lenses can be inserted into the slots at the same time. The combination of included lenses allows for versatile magnification options. Refer to the product image for guidance on adjusting lens position and focal length.COMFORTABLE & ADJUSTABLE HEADBAND: The inner side of the headband is lined with soft sponge padding for comfortable extended wear. The headset includes three adjustment knobs: two side knobs control lens height and angle, while the rear knob adjusts the headband size for a secure fit. The small round lens is 360-degree rotatable, and all lenses can be folded or rotated upward when not in use.WIDE APPLICATION: Constructed from high-quality plastic and acrylic materials, this illuminated headband magnifier offers comfort and functionality. It assists with low vision tasks while keeping hands free. Ideal for activities such as reading, sewing, painting, crafting, jewelry making, soldering, repairing, and other detailed work. A practical choice for hobbyists and professionals alike.BATTERY INFORMATION: 1. Built-in polymer lithium battery (300mAh/1.11Wh, 6.3g, 30*20*6.2mm). 2. Do not charge while the device is in use. 3. Battery supports 300 to 500 charge/discharge cycles. 4. Charge the device before first use, as battery may discharge during storage or transit. 5. Ensure secure connection at battery and charging interfaces to avoid performance issues. 6. If the USB cable is damaged, replace with a standard micro USB cable.MAGNIFICATION TIPS: Use the included lenses with the fixed 8x front lens to achieve desired magnification. Image clarity depends on proper adjustment of focal length. Refer to the third product image for guidance on lens and focal length adjustment. For hands-free comfort, adjust lens angle, headband position, and object placement to achieve optimal viewing without holding items close.