... 4.For 17-24'' LCD monitor 5.Manual,remote,RS232/485 ctrl Conference System Motorized LCD Lift / LCD Monitor ... be conveniently operated with manual control, remote control, RS232/485 central control.3.Monitor lift can lift up/down ... Time ≤50sSteeving Angle≤15°Operation Noise≤25dbControl ModeManual, remote, RS232/485 central controlAccessoriesVGA cable, power cable, remote controller, screws, stators ...