RECHARGEABLE & ADJUSTABLE LED LIGHT: Our magnifying glass with 3 led light has the function of detachable and adjusting the direction of illumination. When using, you can adjust the illumination direction of led for more precise illuminating angle to meet your need. Also, you can take out the battery to charge. It takes 1.5 hours to fully charge through USB cable. Fully-charged battery can make LED light last continuously for 4-8 hours. HIGH QUALITY LENSES: Jewelers magnifying glasses is equipped with 5 replaceable lens and one small round auxiliary lens, which are made of shatterproof crystal clear acrylic lens, high definition and light weight, very durable. You can combine these 5 lens and round lens (8x) to get 23 kinds of magnification to meet different close works: 1x, 1.5x, 2x, 2.5x, 3x, 3.5x, 4x, 4.5x, 5x, 5.5x, 6x, 8x, 9x, 9.5x, 10x, 10.5x, 11x, 11.5x, 12x, 12.5x, 13x, 13.5x, 14x. DOUBLE LENS SLOT DESIGN: Handsfree magnifying headset is designed with two lens slots and one small fixed front round lens(8X). You can put one or two lenses at one time on the slots. We have provided you five replaceable lenses (1.0x, 1.5x, 2.0x, 2.5x, 3.5x) and the small round auxiliary lenses (8x). NOTE:Please refer to our 3rd ad picture to adjust the lenses and the focal length to finish the magnification. COMFORTABLE&ADJUSTABLE HEADBAND MAGNIFIER: The headband inner side of the magnifying glasses is wrapped with a soft sponge, which makes it more comfortable when worn. The magnifying headset with light is designed with 3 knobs: You can use the two sides knob to adjust the height / angle of the lens, and use another one knob on the back side to adjust to fit the head size. The small round lens is 360rotatable, and all the lenses can be folded or rotated upwards when you don't need.