... monitor by manual, remote or RS232, RS485 control; after use finished, lift down to keep ... monitor;2. Manual, RF remote, RS232, RS485 control;3. Direct factory price;4. Low noise;5. CE ... lift has 5 buttons, which are used for manual control (from left to right): Horizontal rotation; Vertical ... .2. Remote control3. RS232, RS485 controlYou can control the LCD monitor lifts working as individual, group ...