Canon Speedlite 600EX II-RT
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Improved performance of continuous flash by approx. 1.1 to 1.5x for fast firing (up to 2.0x if used with optional Compact Battery Pack CP-E4N)
Wireless flash shooting support is available for both radio and optical transmission, offering users greater functional range when using a flash
Multiple flash system allows control of up to five groups of flashes;Approx. 100 to 700 flashes
Power Source:Four AA size/LR6 alkaline or AA/HR6 Ni-MH batteries
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