... lift can lift up/down separately, grouply or entirely to reveal/hide the LCD monitors.4.Five buttons on the ... panel used for controlling to up, down, pause, backward and forward.5.Monitor lift ... 15°Operation Noise≤25dbControl ModeManual, remote, RS232/485 central controlAccessoriesVGA cable, power cable, remote controller, screws, stators etc. Conference System Motorized ...