Rollei Profi Funk-Sender Instructions page 56

Canon master control M mode
56
2) Channel setting (by wireless flash menu)
After the wireless flash is enabled the
transmitter's channel can be set by the
camera menu (only from1 to 4 channels)
and the changed channel will be shown
on the transmitter . You can also use the
channel button on the transmitter to set
the channels from 1 to 16 .
3) Flash transmitting groups
(by wireless flash menu)
Set the flash groups through the wireless
flash while the trigger is transmitting
the signal . The light of the groups and
channels will always be on and the status
light will flicker . The light status for each
group would represent flash groups which
are selectable .
ENGLISH