Carson Hobby Magnifier 3-in-1 LED Lighted Magnifier Set HM-30 The HM-30 Hobby Magnifier is a 3-in-1 LED Lighted magnifier set. To use, simply select from the three lenses included and snap the lens into the base stand. Press the release button to remove the lens and select a new one. The base stand allows you to use as a free standing magnifier while the adjustable neck strap allows you to use hands free. Crystal clear acrylic lenses and two super-bright LED lights ensure a crisp, bright-magnified image. Use AAA batteries (not included). The Hobby Magnifier can be used for all hobbies and crafts. Remove the lens for use as a booklight.