1. Multifunction: The high-definition magnifying glass magnifies artwork or text up to 500% of its original size, which is suitable for bead and gemstone appraisal, archaeology, reading, painting, watch repair, arts and crafts, etc. 2. Adjustable Brightness: Two brightness levels are available to provide excellent light on delicate surfaces. Press the switch on the glasses holder for two brightness levels. 3. Interchangeable Lens Design: 4 interchangeable lenses, 1.5X, 2.5X, 3.5X, 5X magnification. The lenses are made of high-quality material and the surface hardness of the lenses reaches 5H level, which is more wear-resistant and durable. 4. Efficient Charging: 1 hour to fully charge the battery. Simply connect the USB cable to the headband magnifier and the other end to a USB power source (such as a USB wall charger, mobile phone charger, or mobile power supply (not included)) to charge automatically. 5. Comfortable and Easy to Use: The ergonomic glasses holder is comfortable to wear and keeps the magnifier better in front of your eyes. The rubber headband prevents it from falling, making it easier to work for long periods. Specification Item Type: Headband Magnifier Material: ABS + Rubber + Acrylic Battery Type: 602030 lithium battery (comes with built-in battery) Battery Capacity: 300mAh Voltage: 3.7V Power Supply: USB interface Detachable Lens Multiplier: 1.5X, 2.5X, 3.5X, 5X Package List 1 x Frame 4 x Lenses 1 x Lens Storage Case 1 x Charging Cable 1 x Lens Cloth 1 x Headband 1 x User Manual