The SMDV FW-2 AC is an eight-channel trigger set for triggering a flash head from a distance of 20 to 30 metres. The set works with radio waves in the 2.4GHz frequency band. You work with a sync speed up to 1/180s.
Transmitter
With a test button you can check if the two devices are synchronised properly. Simply slide the transmitter onto the camera's hotshoe and tighten it with the dial. The supplied 2.5mm cable connects the transmitter to your camera. The transmitter works on a AAA battery. You can find these under the tab "Accessories".
Receiver
The 3.5mm-cable is for the connection between the receiver and the flash head. You also connect the receiver to the flash head with the short AC cable and then connect the power cord to the receiver again.