The 9T Transmitter provides simple operation, increased range, and a lower cost. Match it up with an FW7Q, FW8R, or an upgraded FW10w Transceiver. You can match sets of FreeXWire units to work together on the same channel, or separate groups of FreeXWires can work independently on different channels.When this unit is connected to one of Quantum's TTL or QTTL adapters, it transmits TTL information to any number of remote FREEXWIRE /Qflash combinations. A "local" Qflash will synchronize also.