Ally Wall Screen can be provided in 16:9,4:3 and 1:1 format. Suiltable for home cinema; teaching; conference etc. Flat curtain,no bad smelland no distortion. The screen surface can stay in any position because of advanced autolocking system. It is easy to operate. ALLY Wall screen has three series faced differnce market. They are Average quality series, High quality series, Top series. Their features are as follows: Average quality: Metal casing; Matte white fabric; High quality: Metal casing; High gain matte white fabric Top wall screen: Aluminium casing; High gain matte white fabric