VX Series User's Manual-18-3 ) Load RCFG Files.RG 128×128Load RCFG FilesSave to RV CardSave to RV CardAll current configurations related the recieving card of VX4U are saved into receivingcard and will not be lost after power fault.OLED BrightnessAdjust the grayscale of OLED display.Hardware VersionCheck the hardware version of VX4U. If new version has been published, LCT-Marscan be connected via PC to upgrade hardware programs.USB Play SettingsVoice On/OffVolume 0~100TRK Track typeLoop Mode Single/ListFunction keys of USB playCVBS1 Stop HDMI Play/PauseDVI Fast rewind VGA1 Fast forwardCVBS2 Previous DP NextBrowsing and selecting the contents of USB drivePress USB key to select USB drive as input source. Press the key again to enter theoperation of USB play. Now the indicator lights of six function keysare on, which will be reused as six operation keys for playback. Press Pausekey(HDMI) to browse the contents of USB drive on LED display, then rotate the knob