12 | About Your Display7 USB 3.0 downstreamports (3)Connect your USB device.You can only use this connector after you have connectedthe USB cable to the computer and USB upstreamconnector on the display.8 USB Dedicated chargingportUSB 3.0 with 12.5 W - For WR517 WirelessReceiver(Optional) Power supply (5V/2.5A)9 RS232 connector Remote management and control of display via RS23210 RJ-45 connector Remote Network Management and control of display viaRJ-45Input sources and USB pairingInput sources USB upstreamHDMI 1 USB 1HDMI 2 USB 2HDMI 3USB 3HDMI 4DPVGABottom ViewLabel Description Use1, 2 Speakers3 Power on/off button