Features : 1.This item is designed for clip onto your existing sun shade to shade the sunshine in the day & prevents car lights at night. Perfect for drivers.2.At different levels of effective anti-dazzle degree. 3.Eyes comfort, relieve eye fatigue, effectively protect the safety of driving under the strong light. 4.Blocking the car light in the night. 5.Shading the sunshine in the day. 6. Fatigue, to reduce the harmful light of visual stimuli Installation is simple, portable Stainless steel metal screws fixed lens.