Dell UltraSharp U2421HE User Manual page 22

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
compliance devices; up to 0.9 A on the other 2 USB downstream ports.
Your computer has the following USB ports:
• 4 downstream - 2 at left side, 2 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 power save
mode. In power save mode, if the USB cable (Type-C to Type-C) is plugged in, the USB
ports can work normally. Otherwise, follow the OSD setting of USB, if the setting is "On
During Standby" then USB work normally, otherwise USB is disabled. 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
SuperSpeed
Hi-Speed
Full speed
USB downstream port
Pin number Signal
1 VBUS
2 D-
3 D+
4 GND
5 StdA_SSRX-
6 StdA_SSRX+
7 GND_DRAIN
8 StdA_SSTX-
9 StdA_SSTX+
Shell Shield
22 | About Your Monitor
battery icon supports fast current
Data rate
5 Gbps
480 Mbps
12 Mbps
battery icon) with BC 1.2
Maximum power consumption
(each port)
4.5 W
2.5 W
2.5 W