1HEAD MAGNIFIER: This is an ergonomic eyeglass frame that prevents the magnifier from falling off and reduces pressure on the bridge of the nose. Ensure strong wear and reduce fatigue during long term use. Also frees up your hands to focus on the object you want to observe 2INTERCHANGEABLE LENSES: The head magnifier pack contain 4 sets of interchangeable lenses of 10x, 15x, 20x, 25x, which can meet your needs for close work. It is recommended to select a lens barrel with appropriate magnification according to the size of the object to be observed. The magnification ratios can be exchanged quickly and put into the corresponding lens storage box to keep clean 3MONOCULAR OBSERVATION: It is recommended to use only one eye of the binocular magnifying glass to observe the object, as the focus will fail when both glasses are used at the same time. You can alternate between the two cylinders to eliminate visual fatigue and effectively improve your work 4DETACHABLE STAND AND HEADBAND: The stand and headband are interchangeable, and the dimmable magnifying glass stand can be flipped up and down to the desired position for better detail viewing 5VERSATILE APPLICATIONS: Heads up magnifying glasses with lights are widely available and are ideal for close work, such as reading, watch or circuit repair, crafts, jewelry appraisal, eyelash extension, welding, painting, etc. Perfect for helping watch repairers, jewelers, the elderly or the nearsighted to observe nearby objects