Canon Speedlite 600EX II-RT Manual (en)

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62
' Radio Transmission Wireless Flash Photography
2. High-speed sync shooting is not possible.
3. Group flash 
(p.79)
 is not possible.
4. Modeling flash from the slave unit 
(p.82)
 as well as remote 
release from the slave unit 
 are not possible.
5. The camera cannot be used as part of a “slave camera unit” 
during linked shooting 
.
The camera can only be used as part of a “master camera unit”.