The Illuminated Handheld 4x Power 3″ Aspheric LED Lighted Magnifier SV-40 is a 4x aspheric magnifier. Aspheric lens magnifiers allow for increased magnification and image clarity while greatly reducing edge to edge distortion. Its 3” crystal-clear acrylic lens allows it to be lightweight enough to use for everyday tasks. The SV-40 is a great low vision aid and assists in reading small print. It features an ultrabright LED light to brighten your viewing area. Uses 3 AAA batteries (not included).