Vello freewave User Manual page 20

7. Reattach the battery
compartment cover for
each receiver.
8. Have your receivers and
flash units turned off before
mounting each flash to its
corresponding receiver.
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9. After each flash is mounted
to a receiver, turn the units
on. Set each flash to its
manual setting and adjust
accordingly.
10. Press the pairing/test button
on the transmitter. All
of the flashes should fire
together.