Clamp-On Magnifying Lamp Magnifier Light Black Visor 5X Magnifier Lamp. This is a new 5X black, illuminated swing arm magnifier with clamp on base. The powerful magnification may help to reduce eye strain. The lens measures approximately 4" (102 mm) in diameter. It is convenient for your home or office and enlarges fine print in books, maps, newspapers, directories, legal documents, etc. It is ideal for reading assistance in low-light conditions 118-120V 60Hz. Uses 60 watt bulb (not included). The swing arm measures approximately 32" (81 cm) long. Lighted Magnifying Visor. This is a new lighted magnifying visor. This magnifier has many features and is easy to operate. It is lightweight and you can get a clear solid view in wide sight through the double lens' two square glass. The headband has a hook and loop strap so it is easy to adjust to the size of the user's head. It has two lights built on the side of the magnifier. It uses 4 AAA batteries (not included). The magnifier lifts up so you do not have to take it off. It leaves your hands free to work. By just sliding down one or both of the lens accessories the magnification changes. This magnifier is used by both amateurs and professionals for mold making, photography, jewelry and electronic repair. The lenses are plastic. Lens powers are: Single lens power is 1.8X. Lens plus pull down lens power is 2.3X. Lens plus auxiliary loupe power is 3.7X. All three have a combined power of 4.8X.