PocketWizard Mini and Flex ......WOW! What a great accessory for the Canon or Nikon shooter! It's the most versatile PocketWizard radio ever. Lock your flash into the FlexTT5 built-in hot shoe, turn it on and you are ready to shoot. The FlexTT5 takes the existing benefits of Canon or Nikon 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.