The Quantum Free Xwire FW8R Receiver can be used to receive a wireless radio flash trigger signal from an FW10w or FW9T transmitter connected to the camera. Or can be used to receive wireless TTL information when connected to the Qflash T5d & a Dw series QTTL adapter on the camera. The FW8R receiver can also be used as a receiver hooked up to the camera with a Quantum Two-Step Motor Drive cord to allow for remote wireless triggering of the shutter release. With a 2-step cord you keep your cameras meter & focus function continuously on (as in pressing the shutter button half way).