Carson's Lighted Attach-A-Mag is a fully adjustable, flexible arm, hands-free LED lighted magnifier with a clamp-on base that attaches to most tabletops. Its large 2x power acrylic lens provides sharp, crystal-clear images. Super-Bright LED light ensures a bright clear image. Operated on three 386 (SG12) button cell batteries (included). The lighted Attach-A-Mag is great for reading fine print, ideal for hobbies, model building, small electronics and perfect for fly-tying.