The Most Versatile PocketWizard Ever. The dedicated FlexTT5? Transceiver, with its built in hot-shoe and ControlTL? firmware, is the perfect addition to Canon E-TTL II flash systems. The FlexTT5 takes the existing benefits of Canon wireless systems beyond the boundaries of infrared technology. When paired with the Mini TT1? Transmitter or another FlexTT5 Transceiver, a whole new world of wireless flash freedom opens up. The FlexTT5 is also the perfect Transceiver for your manual triggering needs and works with all MultiMAX channels and many of the MultiMAX advanced functions.