Dell 2009WFP User's Guide - Page 7

Universal Serial Bus (USB) Interface This section gives you information about the USB ports that are available on the left side of your monitor. NOTE: This monitor supports High-Speed Certified USB 2.0 interface Transfer speed Data Rate Power Consumption High speed Full speed Low speed 480 Mbps 12 Mbps 1.5 Mbps 2.5W (Max., each port) 2.5W (Max., each port) 2.5W (Max., each port) USB Upstream Connector Pin Number 1 2 3 4 4-pin Side of the connector DMU VCC DPU GND USB Downstream Connector Pin Number 1 2 3 4 4-Pin Side of the Signal Cable VCC DMD DPD GND USB Ports l 1 upstream - rear l 4 downstream - 2 on rear; 2 on left side NOTE: USB 2.0 functionality requires a USB 2.0-capable computer. NOTE: 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 may take a few to resume normal functionality.