1. 4 pairs of interchangeable lenses, choose different lenses to work according to your needs. 2. Left and right double eye patch magnifier with LED light. 3. Both left and right eye cups can be flipped up 180 degrees, also can be moved to the left/right by 5 mm. 4. The stand and headband can be removed and used alternately. 5. Headband magnifier is , portable and . Magnification: 10 times, 15 times, 20 times, 25 times Power supply: 6xLR1130 battery (included) Colour:Black Material:Plastic + acrylic optical lens Package Contents: 1 x glasses 1 pair x 10x lenses 1 pair x 15x lenses 1 pair x 20x lenses 1 pair x 25x lenses Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.