RF 605 C
The rf 605 allows you to fire your speedlights at a distance of up to 100 meters. This manual trigger allows you to set 6 groups and works on both the 603 and 602 frequencies so that you can mix in your older triggers and continue to use them with this system. The 605 also can be used as a remote shutter release for your camera. You have nothing to worry about when it comes to interference from other devices as well since you have 16 different channels available. These things really pack a punch for how inexpensive they are. They come in Canon and Nikon versions, although they can be used on any standard hot shoe. The only thing you will lose from performance when used on a different camera system is the ability to wake the flash up by halfway depressing the shutter button.