Dell C2722DE 27" 16:9 IPS Video Conferencing Monitor - Manual (Page 57)

Setting up the monitor | 57
Make sure to set USB-C Charging to On in Off Mode. While the PC and two
monitors are in an initially OFF power state, by pressing the power button on Monitor 1
or Monitor 2 will turn ON the PC, Monitor 1, and Monitor 2.
Monitor 1
System power state(OFF)
USB Type-C
port1
Monitor 2
USB Type-C
port2
USB Type-C
USB Type-C
System power state(ON)
Pressing power button on Monitor 1 or 2
Monitor 1
USB Type-C
port1
Monitor 2
USB Type-C
USB Type-C
USB Type-C
port2