1. A wide angle rear window lens gives you an increased view of the blind area behind your car.
2. You will find it very protective for avoiding your possible accidents in your blind spot.
1. Size: 140mm x 113mm. 2. The dotted lines show the view area without backsee and the solid lines show the view area with backsee. 3. View angle: upward: 13 degree, sideways: 25 degree, downward: 28 degree. 4. Material: acrylic.