The Quantum QF9N Qflash PILOT Shoe Mounted Flash provides all the features of the TRIO without the flash head. With built-in Free Xwire TTL radio & QTTL adapter for your digital camera you control an unlimited number of remote Qflashes. Slip it onto the camera hot-shoe & go, its self powered. Or connect a Turbo with the included long power cable CQ8 or the accessory short power cable CCQ8. PILOTs radio sends TTL commands to other remote Qflash TRIOs. Configure distinct modes & settings of remote Qflash TRIOs from the on-camera PILOT. &, the on-camera PILOT controls older Qflash models mated to Free Xwire receivers. Radio QTTL signals from PILOT do not require line-of-site like camera optical links. Theyre more reliable & work at 5 times the distance.