Quantum QF8C Qflash TRIO Shoe Mounted Flash with Built-In FreeXwire TTL Radio for Canon Digital SLRsCondition:* Used, tested fine for basic operation. As pictured. Additional Notes:* Compact, shoe mounted Qflash with High Speed Sync capabilities* Trio for Canon cameras* Control and synchronize any number of remote Qflash* Send camera TTL wireless data to remote Qflash* Receive QTTL signals from other TRIO’s or FreeXwire transmitters* Unlimited rapid-fire, full power flashes* Built-in transmitter and receiver. TRIO can be the on-camera Qflash and control unit or a remote QflashQuantum QF8C