Two configurations with one body: glasses or loupe. Loupe powers: 10X, 5X and 4X attachments. Glass powers: 1X, 1.5X, 2X, 2.5X and 3.5X. Multi-coated acrylic lenses. Head mount slides and tilts. Two flip-in lens attachments. Combine lenses for higher magnifications. Plastic body, elastic band, one size fits most. Super bright white LED and 2 plastic lens cases. Requires 3 ‘AAA’ batteries (not included).