The Bower RCWN2R Wireless Shutter Release Set is an extended range wireless system designed for professional and advanced amateur users of select Nikon cameras with a DC1 connector. The set consist of the receiver and the shutter release transmitter. The remote system is very handy for taking pictures of subjects that are difficult to approach, or to minimize vibration for close-ups and time exposure. The remote fires the camera from a maximum distance of 90'. Sixteen transmission channels are available to prevent interference between other cameras using wireless remotes.