... close motorized screen. 2.Motorized,manual, RF remote control; 3.RS232, RS485 control. Introduction:LCD flip device is designed to ... 21'', other size can be customized.Function:1. Electric control, Flexibility, stability, waterproof and dust proof;2. The ... Very easy operation for any user to control;4. Control mode: manual control, RF remote control and central control, with RS232, RS485 connectors;5. ...