VX4S/VX4 User's Manual-2-⑦ : Function keys�TAKE: Display switching shortcut key. After short pressing TAKE key, PIP willbe opened; if it has been opened, the switching between MAIN and PIP will berealized. Fn: Custom shortcut key.⑧ : Flat mouth (Type A, female USB) is USB interface, which connects U disk;Square mouth (Type B female USB) is USB controlling interface, communication withPC.Rear PanelInput SourceAudio Audio InputDP DP InputHDMI HDMI InputCVBS1~CVBS3 3-Channel PAL/NTSC TV composite video InputsDVI -1~DVI-2 2-Channel DVI InputsVGA1~VGA3 3-Channel VGA InputsOutput InterfaceDVI LOOP DVI LOOP OutputMonitor -VGA OUT VGA Monitoring InterfaceMonitor -DVI OUT DVI Monitoring InterfaceLED Out 1、2、3、4 4-Channel LED OutputsControlling InterfaceETHERNET Network Control (Communication with PC, or AccessNetwork)Type B, female USB USB Control (Communication with PC, or Cascade IN)Type A, female USB USB Cascade OUTPowerAC 100-240V ~ 50/60HZ AC Power InterfaceTips:The two USB interfaces ( typeA) on front panel and rear panel are both forbidden toconnect with PC directly.Xi’an NovaStar Tech Co., Ltd.