... passed CE,TUV,RoHS Auto Roller window ShuttersSurface treated power coating;Components keep color period 15 years ... Manual, pure electric and remote-controlled operation, After the window opened, the oppression like in cage and stain in vision ... noise-proof , warm-keeping .Save energy design, when the roller shutter closed, can saving 30% energy, obstructed 100% sunshine. Auto Roller window Shutters