Canon Speedlite 600EX II-RT Manual (en)

600EX II-RT System
Device equipped with radio transmission wireless master 
600EX-RT, 430EX III-RT, ST-E3-RT
Speedlite equipped with radio transmission wireless slave 
600EX-RT, 430EX III-RT
Device equipped with optical transmission wireless master 
600EX-RT, 600EX, 580EX II, 580EX, 550EX, 90EX, MT-24EX, MR-
14EX II, MR-14EX, ST-E2, and EOS DIGITAL cameras with optical 
transmission wireless master function by built-in flash
Speedlite equipped with optical transmission wireless slave 
600EX-RT, 600EX, 580EX II, 580EX, 550EX, 430EX III-RT, 430EX 
III, 430EX II, 430EX, 420EX, 320EX, 270EX II
Off-Camera Shoe Cord OC-E3
Enables the 600EX II-RT to be connected to the camera up to 
approx. 60 cm / 2 ft. away.
Compact Battery Pack CP-E4N
A small and lightweight external power source with superior 
portability. Equipped with dust and water resistance equivalent to 
600EX II-RT.
Speedlite Bracket SB-E2
Using an external power source other than Canon may result in a 
When using a Speedlite without a function for switching the firing groups 
(A, B, C) in *, you can use the Speedlite as a slave in firing group A 
during optical transmission wireless shooting (you cannot use it as a 
slave in firing group B or C).
For external power source, use of the Compact Battery Pack CP-E4N (sold 
separately) is recommended.