... in the meeting, the LCD monitor lift, which is hiding under the table, can lift up the monitor by manual, remote or ... 20s;7. RS232, RS485, manual and remote control;8. Lift up and down automatically;Three Control Modes1. Manual switchThe panel of ... control (from left to right): Horizontal rotation; Vertical rotation, Pause, Lift-up, Lift-down.2. Remote control3. RS232, RS485 controlYou can control the ...