Features:
1. The glass lens is mounted in a plastic body.
2. The diopter is adjustable and the focal distance can be also changed by twisting the telescope collar.
3. It is convenient to fix on the frame with the bended clamp.
4. The external diameter of the aid is 35mm.
5. The length of the aid is 50mm.
Specifications:
1. Magnification: 2.8X
2. Lens diameter: 28mm
