Fangrui Product Details Interchangeable Lens Design: 4 Interchangeable Lenses, Magnification 1.5x, 2.5x, 3.5x, 5x. The Lens Is Made Of High-quality Materials, And The Hardness Of The Lens Reaches Level 5h, Making It More Wear- And . Adjustable Brightness Levels: There Are Two Brightness Levels That Provide Excellent Light To Illuminate Detailed Surfaces. Two Brightness Levels Are Available With The Push Of A Switch On The Glasses Holder. Comfortable And Easy To Use: Adopt Ergonomic Glasses Holder, Comfortable To Wear, Better Fix The Magnifying Glass In Front Of Your Eyes. The Rubber Headband Effectively Prevents Falls, Making It Easier To Work For Long Periods Of Time. Usb Efficient Rechargeable Battery: With Usb Charging, You No Longer Need To Buy Batteries, Reducing Weight, Saving Money And Energy. It Can Be Fully Within 1 Hour And Can Work For 8 Hours After Full Charge, Which Greatly Extends The Working Time Of The Led. Versatility: View Artifacts Or Text In High Definition Up To Of Original-size. This Led Head Magnifie