"THE MOST ADVANCED LIGHTING SYSTEM ON A MAGNIFIER: This led magnifier is designed with 12 SMD led lights that are covered by an anti-glare reflector, directing lighting to a specific region without causing glare to your eyes and providing an equally lit viewing area. Big VIEWING AREA WITH CRYSTAL CLEAR LENS: Optical quality magnifying lens covers wide viewing area without requiring constant hand movement; lens (viewing area) measures 4.5""x 7"" and magnifies up to 300%. 12 ENERGY EFFICIENT LEDS CONTROLLED BY DIMMABLE Toggle: Our SMD LEDs are engineered to last 100,000+ hours and not only provide a more uniformly illuminated and brighter viewing area, but they also consume less power than regular LEDs, resulting in a new set of batteries lasting twice as long. LIGHTWEIGHT & ERGONOMIC DESIGN: This LED magnifier is only 6 ounces in weight, and the grip is ergonomically suited for most hands, making it great for long reading sessions. The brightness peaks at 720 lumens, its brightest on the market, and these LEDs are meant to survive for more than 20 years without wearing out or overheating."