The quantum qflash trio qf8c combines a qflash head with built in freexwire ttl radio and qttl adapter for your canon digital camera slip it onto the camera hot shoe connect a turbo battery and youre ready to start shooting the trios radio trigger sends ttl commands to other remote qflash trios you can configure distinct modes and settings of remote qflash trios from the on camera trio in addition the on camera trio can remotely control an unlimited number of older qflash unit models ma