... set digital control equipment 3.CE,ISO9000 Inner square trivision display1.Maintenance free,2.Full set digital ... control equipment3.CE,ISO9000Inner square trivision display ,trivision display ,trivision billboardThe specification:External ... supply : voltage:220v frequency: 50hz,90w Weight : 26kg/square meterDriving: double-gear steps driving system Honghai Tri-vision display ...