"Product details Features: Removable silicone headband can be installed to ensure tight fit and reduce fatigue Ideal for machining, jewelry identification, watch repair and micro-engraving. The top of the magnifying glass frame is designed with 2 LED lights to help you see it clearly even in dim light. A soft black headband helps you attach your magnifying glass to your head to free your hands and increase productivity. Specification: Material: ABS silicone Magnifying Glass Size: Approx 95 42 mm Eyeglass Frames Size: Approx 222mm 145mm 65 mm Single-plate Lens Magnifications: 1.0X,1.5X,2.0X,2.5X,3.5X Field of view: Approx 555mm(1.0X),381mm(1.5X),278mm(2.0X),183mm(2.5X),156mm(3.5X) Package Included: 1 Magnifier 1 Headband 5 Lens(1.0X, 1.5X, 2.0X, 2.5X, 3.5X) 1 Carry Box "?Alternate between wearing glasses or a headband. The included headband is easy to install to ensure a firmer fit. ?Ideal for dentists, electricians, jewelers, sewing, handicrafts, beauty, paint and the elderly. ?5 magnifying lenses - 1.0 times, 1.5 times, 2.0 times, 2.5 times, 3.5 times, you can choose a variety of lenses according to your different needs. ?Both styles of glass legs and elastic bands are designed to soothe and comfort, reduce pressure on the nose and reduce fatigue. ?The magnifying lens is easy to assemble, portable and sturdy, and can be carried around. Energy-saving LEDs are installed in the frame. Powered by 3 AAA batteries (not included).