Ideal for detailed hobby work, such as knitting or model building, the MV-23 MagniVisor, from Carson, is a hands-free 2X magnifier with a 3X flip-down lens and adjustable headband. It comes with an adjustable headband. The MagniVisor Magnifier is perfect for all hobbies and crafts! The Magnivisor is the perfect Low Vision Aid. At Carson, we strive to make sure our customers are 100% 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.