Plug and Play CapabilityYou can install the monitor in any Plug and Play-compatible system. The monitor automatically provides the computer system with its Extended DisplayIdentification Data (EDID) using Display Data Channel (DDC) protocols so the system can configure itself and optimize the monitor settings. Most monitorinstallations are automatic; you can select different settings if desired. For more information about changing the monitor settings, see Operating the Monitor.Universal Serial Bus (USB) InterfaceThis section gives you information about the USB ports that are available on the left side of your monitor.USB Upstream ConnectorUSB Downstream ConnectorUSB Portsl 1 upstream - backl 4 downstream - 2 on back; 2 on left sideLCD Monitor Quality and Pixel Policy19 DP_PWR Return20 +3.3V DP_PWRNOTE: This monitor supports High-Speed Certified USB 2.0 interface.Transfer speed Data Rate Power ConsumptionHigh speed 480 Mbps 2.5W (Max., each port)Full speed 12 Mbps 2.5W (Max., each port)Low speed 1.5 Mbps 2.5W (Max., each port)Pin Number 4-pin Side of the Connector1 DMU2 VCC3 DPU4 GNDPin Number 4-Pin Side of the Signal Cable1 VCC2 DMD3 DPD4 GNDNOTE: USB 2.0 functionality requires a USB 2.0-capable computerNOTE: The monitor's USB interface works only when the monitor is on or in power save mode. If you turn off the monitor and then turn it on, the attached peripherals maytake a few seconds to resume normal functionality.