Profoto Acute/D4 Ringflash
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Note: This flash head does NOT include a power supply. You will need to plug it into a Profoto power pack.
It's maximum firing rate is 9600 w/s per minute, which is equal to 4 flashes per minute at 2400 w/s, 8 flashes at 1200, 16 at 600, 32 at 300, or 64 flashes per minute at 150 w/s.