Canon SPEEDLITE 270EX II Mode D'emploi page 20

Transmission channel
You can use the flash regardless of the transmission channel (1 to 4) on the master unit.
Slave ID (firing group)
The slave ID is set (fixed) to group A. This cannot be changed to group B or C.
Auto power off on the slave unit
When the power switch of the 270EX II is set to <SLAVE>, the power of the flash turns off
automatically if no operations are made within 60 or 10 minutes (p.16 C.Fn-10).
If the master unit does not have a function for canceling the auto power off (p.16 C.Fn-11) on
the 270EX II, set the power switch of the 270EX II to <OFF> and then to <SLAVE> again.
The supplied mini stand is for use only with the 270EX II. Use with another flash may cause
the attached flash to fall.
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