... projection screen 1,110V , 220V 50/60HZ 2,with manual control 3,used for conference room 4,material:white matt matt white projection ... multimedia classrooms, conference rooms, cinemas and presentation halls, etc.MaterialControlPowerSize (inch)ProportionGlass BeadedMatt WhiteRemote ControlManual ControlAC220V 50HZAC110V 60HZ60″/80″/84″/100 ...