High Speed Sync

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The MiniTT1 and FlexTT5 support High Speed Sync (HSS) for Canon and FP Sync for Nikon. No configuration is necessary. HSS/FP is seamlessly engaged with the default settings at appropriate shutter speeds, letting you synchronize flashes that support HSS/FP at any speed. Keep in mind that flashes actually pulse and act as a continuous light in this mode, which significantly reduces effective flash power.

Mark Wallace demonstrates High Speed Sync in this video:

Read more about the available options for high speed photography with any flash: Understanding HyperSync and High Speed Sync.

See details from Canon about High Speed Sync with Speedlites at canon.co.jp.

See details from Nikon about FP Sync with Speedlights at nikonusa.com.