The Nikon dedicated Pocket Wizard FlexTT5 Transceiver, with its built in hot-shoe and ControlTL firmware, is the perfect addition to Nikon i-TTL II flash systems. The FlexTT5 takes the existing benefits of 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.