Patent No.:ZL 200630040867.6 Usage: Widly used in garage,hospital,school,warehouse,supermarket
etc.. Quality Description: 1.The lens is made of PMMA(Acrylic),which makes it stronger
than others. 2.You may choose the right specification according to your
need. Characteristic: 1.Wide the sight-viewing by using domes. 2.Avoide the accidents caused by the blind-viewing.