Features Comfortable to wear: the inside of the headband is made of a soft sponge, which is suitable for wearing on the head. With the adjustment knob of the headband, you can adjust the ideal size, pull to adjust and press to lock. Fits all head sizes perfectly. With two knobs on both sides, the height of the magnifying glass can be adjusted. Clear Magnification With 4 detachable lenses and 1 small circular auxiliary lens, the magnifying glass is equipped with shatterproof transparent acrylic lenses, providing high resolution and portability. Small circular auxiliary lenses can be rotated 360°. You can combine these 4 rear secondary lenses with 2.0x, 2.5x, 3.0x and 3.5x magnification with the 1.5x front primary lens and the 8x small circular lens to create different magnifications Wide application: can also help you improve visual impairment and free your hands instantly. Suitable for reading, painting, observing, modelling, repairing, sewing, welding, jewellery making and other hobbies. Features 3 LED Lights:3 LED lights can adjust the lighting direction to get a more accurate lighting angle. Supports 5 hours continuous operation with 5 hours and 2.5 hours in strong light. Dual Slot Design The design of headband magnifier features two lens slots and an 8X front circular lens. You can insert one or two lenses into the slot at the same time. Specification: Item Type:Head Magnifier Product Model: MG81000GC Product material: ABS plastic, 6 pieces optical acrylic lenses. Lens magnification: Front main lens: 1.5X Replaceable rear secondary lenses: 2.0X, 2.5X, 3.0X, 3.5X. Small Secondary Lens: 8X Focal length of the lens: approx. 38 ~ 330 mm/1.5 ~ 12.99 inches, the focal length of each lens please refer to the instruction manual (English language not guaranteed). Power supply model: USB charging type. Supports continuous operation for 5 hours in soft light and 2.5 hours in strong light. Light Source: 3 x White LED Light Battery: 1 x 602030 polymer lithium battery with 300mAh capacity, comes with built-in battery. Package list: 1 x head magnifier. 4 x glasses. 1 x Glasses Storage Box 1 x wiping cloth. 1 x USB cable. 1 x user manual (English language not guaranteed) Package List 1 x Head Magnifier 4 x Eyeglass 1 x Eyeglass Storage Box 1 x Wiping Cloth 1 x USB Cable 1 x User Manual