The HM-30 Hobby Magnifier is a 3-in-1 LED Lighted Magnifier set. Set includes: LED lighted base with clip-on base stand, 2x 110mm rimless round acrylic lens, 2x acrylic Fresnel lens with 3x spot lens, 3.5x dual acrylic lens and adjustable length neck strap. 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. Uses AAA batteries (not included). The Hobby Magnifier can be used for all hobbies and crafts. Remove the lens for use as a Book Light. At Carson, we strive to make sure our customers are 100 Percent satisfied with the quality of our magnifiers. We are so confident in our magnifiers that we back them with a Lifetime Limited Warranty! Carson will repair or replace your magnifier if it is found to have manufacturing defects in materials or workmanship. Please contact Carson for additional warranty details.