The Qlink-FW6C provides Qflash TRIO* or PILOT owners with radio-TTL control of remote Canon flash units, including Manual, TTL and Auto functions. The remote Canon flash units can also be mixed in with additional remote TRIO models, and assigned to groups for specific tasks.Complete Q-Link configuration requires the Qlink-FW6N and FreeXwire FW8R (sold separately), with the complete set up capable of receiving signals up to 600ft.*Not compatible with TRIO BASIC unless upgraded through Quantam to a full featured TRIO.