Promaster Multi-Function RF Timer Remote 2.4GHz wireless remote control system Transmits up to 300'/100 meters 16 channels allow allow for reliable use in almost every area Works with most Nikon, Canon, Samsung, Pentax, Olympus, Fuji and other cameras which have a wired shutter release port Requires the use of a ProMaster Camera Release Cable to fit your camera. (NOT INCLUDED. SEPARATE PURCHASE REQUIRED.)