Multiple coated acrylic lens. Multiple magnification of 1.5X to 10.5X possible by combining 2 lenses (1.5X fixed and 1.5X flip-up) and a 7.5X loupe. 2 Bright LED bulbs to illuminate viewing area. Adjust beam with tilt & angle controls. Adjustable head strap with dial control. Requires 2-AAA batteries, not included. China.