The carson mr-15 is a reading bar with led lights and has a 2x magnification and a length of 245mm. it is a useful accessory for reading. You can adjust the intensity of the built-in led light in three levels. at the bottom of the handle there are two small led lights, which shine the light like a 'flashlight' under the ruler. in this way you can create extra lighting over the entire length of the magnifying glass, so that you can illuminate several sentences from left to right at once. The magnifying reading bar is completely transparent, allowing you to place the magnifying glass on the subject and look through the glass to read the letters. the magnifier is also equipped with an integrated power-spot lens, which is located directly next to the handle. the unit is lightweight and easy to carry in the included velvet storage pouch. Usage carson mr-15 The magnifying glass is an indispensable accessory for reading small print in books, newspapers and magazines. through the led lighting you can also use the magnifier in circumstances where less light is present. to use the led lighting, place three aaa batteries (not included) in the compartment at the back of the handle. you can then determine the desired light intensity by setting the slider to level 1, 2 or 3.