This is the Trident Underwater Handheld Magnifier 2x Magnification Level Features: Plastic underwater magnifier with 2 magnification levels from Trident Clear area is 2 x 4" Rectangle magnification 2X Inner round magnification 4X Perfect for taking a closer look at all the tiny organisms on the reef See underwater organisms&'; detail like never before! Great for reading slate, dive maps, fish IDs or looking at sea life up close!