Transition means the color can transit from clear to dark gray not means bifocal or progressive. The stronger of the sunlight, the darker of the lenses will be. The lenses can't change color indoor or in the car.
Brand new and high quality
Frame Material: Stainless Steel
Lens Material: 1.56 index aspherical lens
Lens Features: Transition Photochromic
Lens Strength: +1.00, +1.25, +1.50, +1.75, +2.00, +2.25, +2.50, +2.75, +3.00, +3.25, +3.50, +3.75, +4.00（ +1.00~4.00 by Increments of 25）
1 reading glasses, 1 case