The case with human nature can be opened by light touch. It is convenient to apply for household. Face plate is flame-proof and anti-flaming ABS, pure ivory, high intensity, it doesn’t change color for ever, the transparent material is PC; Bottom box material is excellent cold roll steel plate, surface is sprayed by plastic or plated by electricity .It do-esn’t distort, oxide, anti-erode.. http://www.yingselectric.com