Vello FWIRC-C FREEWAVE User Manual page 10

When positioning wireless slaves to light
a subject, keep in mind the following:
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• Make sure the Commander's
transmitter is facing your flash's
IR sensor and that there are no
obstructions between the two units
(see Turning On the FreeWave IR
Commander on page 12 for more).
• The effective communication
range between the FreeWave IR
Commander and your slave flash
units may vary, depending on the
ambient light.
• When photographing outdoors or in
bright ambient light, the sensors can
be overwhelmed by ambient light,
which will lower their sensitivity.