Canon Speedlite 580EX II Instruction Manual page 6

synchronization button
Battery compartment
Battery compartment
Wireless set button
(p.20136.
39,40,41, 42.45)
Power switch
(p.10)
<OFF>
: Power off
<ON>
: Power on
Lock-release button
Dust- and water-resistant
<@>
SelectlSet button
adapter