Quantum Qflash Flash Pilot for Nikon QF9N Qflash PILOT has a built-in FreeXwire TTL radio and QTTL adapter for controlling an unlimited number of remote Qflashes PILOT's radio sends TTL commands to other remote Qflash TRIO's and Qflash 5dR's up to 600-Feet away. Use four AA batteries or any Turbo power pack for PILOT power