Feature: 1. Has 3 LED Lights: 3 LED lights can adjust the lighting direction to obtain a more accurate lighting angle. Supports 5 hours continuous operation with 5 hours and 2.5 hours with strong light. 2. Comfortable Wear: The inside of the headband is a soft sponge that is suitable for wearing on the head. The headband adjusting knob can adjust to an ideal size, pull to adjust, and press to lock. Perfect match for all sizes of heads. Two knobs on both sides can adjust the height of the magnifying glass. 3. Clear Magnifying: With 4 removable lenses and 1 small circular auxiliary lens, the magnifying glass is designed with shatterproof transparent acrylic lenses, providing high definition and portability. Small circular auxiliary lenses can rotate 360 °. You can combine these 4 rear secondary lenses of 2.0X, 2.5X, 3.0X, 3.5X with the 1.5X front primary lens and 8X small circular lens to obtain various magnifications to meet your different needs. 4. Two Slots Design: The headband magnifying glass design has two lens slots and a 8X front circular lens. You can place one or two lenses in the slot at a time. 5. Wide Application: Can also help you improve low vision and free your hands at once. Suitable for reading, painting, observing, modeling, repairing, sewing, welding, jewelry making, and other hobbies. Specification: Item Type: Head Magnifier Product Model: MG81000GC Product Material: ABS plastic, 6pcs acrylic optical lenses. Lens Magnification: Front Main Lens: 1.5X Interchangeable Rear Secondary Lenses: 2.0X, 2.5X, 3.0X, 3.5X Small Secondary Lens: 8X Lens Focal Length: Approx. 38 ~ 330mm / 1.5 ~ 12.99in, please refer to the user manual for the focal length of each lens. Power Supply Model: USB charging type. Supports continuous operation for 5 hours with soft light, and 2.5 hours with strong light. Lighting Source: 3 x white LED light. Battery: 1 x 602030 polymer lithium battery with 300mAh capacity, shipped with built in battery. . Package List: 1 x Head Magnifier4 x Eyeglass1 x Eyeglass Storage Box1 x Wiping Cloth1 x USB Cable1 x User Manual