The Dot Line Corp. RPS RS-RT05R4C Receiver is an extra receiver for use with the RPS RS-RT05K4C & RS-RT05K4CS Deluxe Digital Wireless Flash Trigger Kit. It will fire your shoe-mount, handheld, or studio flash unit from any camera that has a hot shoe or PC outlet within a 100' (30.48 m) range of the transmitter. Wireless remote triggers are very handy for taking pictures of subjects that are difficult to approach, or to minimize vibration for close-ups and time exposures.
The transmitter and receiver work on 4 discrete, user-selectable channels. You can set up each receiver to work on a different channel, and fire each unit with only one transmitter.
The receiver runs on 2 AAA batteries (not included) which should last for approximately 30,000 firings, and is equipped with a stand-by mode that saves battery power.