The minibrite (PO-25MU) from Carson is a 3x power compact magnifier with a protective sleeve that slides out to cover the lens when not in use. This set includes 4 minibrite pocket magnifiers. Each magnifying glass contains a built-in LED light. Each magnifier is powered by 3 AAA batteries (not included). use the slide-out cover to protect the lens from dust, debris and from scratching when not in use. The crystal clear, acrylic lens offers users a sharp and distortion-free image. The lens diameter is 1.3 inch (L) x 1.5 inch (H). the minibrite is extremely versatile and can be used for reading books, Newspapers, magazines, coupons, labels, Inspection of coins and stamps, jewelry design, PO-25MU building, hobby, crafts, tasks and more. The minibrite is small enough to fit inside of your purse, glove compartment or pocket and is great to take with you on the go. The minibrite magnifying glasses are backed by Carson. At Carson, we strive to make sure our customers are 100 percent satisfied with the quality of our magnifiers. Carson will repair or replace your magnifier if it is found to have manufacturing defects in materials or workmanship..