... The lift can be conveniently operated with manual control, remote control, RS232/485 central control.3.Monitor lift can ... reveal/hide the LCD monitors.4.Five buttons on the panel used for controlling to up, down, pause, backward ... Angle≤15°Operation Noise≤25dbControl ModeManual, remote, RS232/485 central controlAccessoriesVGA cable, power cable, remote controller, screws, stators etc. Conference System ...