L.E.D. Head Mag Plus Eye Loupe Head Mag Plus Eye Loupe Power: 2.2x, 3.3x, 3.7x, 4.8x. Very comfortable to wear and is dual lens too. The primary lens is 2.2x, but you can activate the 2nd lens (3.3X) to combine with the first set. It is Lighted with LED on each side. This makes the power strenght 3.7x, Then you can employ the ''drop-down'' loupe, that is 4.8x. A really nice magnifier, and has many uses. Batteries required. Batteries not included.