Canon MiniTT1 and FlexTT5
From PocketWizard Wiki
Congratulations on your purchase of the PocketWizard MiniTT1™/ FlexTT5™ System for Canon DSLR E-TTL II cameras and flashes. Canon owners can use the MiniTT1 Transmitter and FlexTT5 Transceiver to control single or multiple off-camera Canon E-TTL II flashes at speeds up to 8fps. The PocketWizard ControlTL™ System takes the complex E-TTL II data being sent through the camera’s hot shoe and digitally interprets and transmits it as a reliable radio signal. You can now place E-TTL II (or manual) flash units anywhere to illuminate the scene: Around corners, out-of-sight and in bright sunlight. The MiniTT1 and FlexTT5 are compatible with any PocketWizard for triggering manual flash or remote cameras.
