1. automatic Monitor motorized flip up mechanism; 2. Manual, RF remote, RS232/485 control; 3 ... size is 17'', 19'', 21'', other size can be customized.Function:1. Motorized control, Flexibility, stability, waterproof and dust ... is available; With RS232, RS485 connectors, can be central control.4. Very easy operation for any user to ... together. conference room automatic Monitor motorized flip up mechanism