... the table, can lift up the monitor by manual, remote or RS232, RS485 control; after use ... : 19 inch corresponding to the LCD monitor;2. Manual, RF remote, RS232, RS485 control;3. Direct ... Lift up and down automatically;Three Control Modes1. Manual switchThe panel of the LCD Monitor lift has ... 5 buttons, which are used for manual control (from left to right): Horizontal rotation; Vertical ...