Dell S2721DGFA User Manual page 20

Universal Serial Bus (USB)
This section gives you information about the USB ports available on your monitor.
NOTE: Up to 2 A on USB downstream port (port with
icon) with BC 1.2 compliance devices; up to 0.9 A on the other 2 USB
downstream ports.
Your monitor has the following USB ports:
• 1 upstream port
• 4 downstream - 4 at bottom
Power Charging Port - the ports with
charging capability if the device is BC 1.2 compatible.
NOTE: The monitor's USB ports work only when the monitor is on or
in the standby mode. If you turn off the monitor and then turn it on,
the attached peripherals may take a few seconds to resume normal
functionality.
Transfer speed Data rate
SuperSpeed
Hi-Speed
Full speed
20 | About your monitor
Maximum power consumption (each port)
5 Gbps 4.5 W
480 Mbps 2.5 W
12 Mbps 2.5 W
battery icon supports fast current
battery