Can H5CX Digital Timers be used as a Twin Timer?

Yes, it can be used.
H5CX is set by default to be used as Timers. To use it as Twin Timers, select the twin Timers for the timers/twin timer selection.

Twin timers output mode can be set to either flicker OFF start or flicker ON start.

Applicable models: H5CX-A and H5CX-L

Note: The H5CX-B does not have a twin timer function.