Detachable & Durable&High Definition Lenses: Lighted magnifying glass is designed with detachable lenses (4 Lenses Magnifications: 1.5X, 2.5X, 3.5X, 5X), which are made of acrylic resin material, reach 5H hardness of the surface of the lens, more wear-resistant, not easy to scratch, high definition and light weight, very durable and not easy to deteriorate after long-term storage. Focal length (the lens length to the object.): 13.11inch1.5X), 7.87inch2.5X, 5.59inch3.5X, 3.93inch (5X). Rechargeable & Adjustable LED light: Magnifying glasses for close work is designed with adjusting the direction of illumination. You can adjust the headlight direction up and down for more precise illuminating angle to meet your need. The battery power indicator light on the side of the magnifier headset to let you know when to charge. Headband magnifier with light will take 1.5 hours to fully charged via Type-C USB cable. Fully-charged battery can make LED light last continuously for 3.5-7 hours. Comfortable & Adjustable to Wear: Our headset magnifier is desinged as ergonomic glasses frame, with an adjustable and silicone-coated nose bracket, very light weight and just like your own glasses which is very comfortable to wear. The attached elastic headband can effectively prevent falling, so it can fit different-sized heads, and won't put too much pressure on your temples and head. and magnifier with light hands free will not feel fatigue after long time wearing. Easy to Replace: Magnifier with light hands free is designed with the one lens slot, which can help you to replace the different magnification lenses quickly. Just use your two fingers to hold the lens (avoid fingerprints on the lens) and then insert into the slot easily, hear a click to complete the installation. The lens will be firmly stuck in the slot and not easy to fall off. Package include one soft cleaning cloth will help you better wipe fingerprints off the lens without scratching the surface.