... .Hand-protect function. 2.Motorized,manual, RF remote control; 3.RS232, RS485 control. 4.screen brand: Samsung Introduction:LCD flip device ... normal size is 17'', 19'', 21'', other size can be customized. Function:1. Electric control, Flexibility, stability, waterproof and dust ... RS232, RS485 connectors, can be central control.4. Very easy operation for any user to control;5. This LCD flip up device ...