Operate your camera wirelessly with this 16-channel radio shutter release that has an effective range of 100'. This set contains a compact transmitter & a receiver & is for use with Canon, Pentax, & other SLRs with a 2.5mm shutter release jack. The transmitter features a telescopic antenna & is powered by a 12-volt battery (which is included). The two-stage button allows for focusing & shutter release which is indicated by the LED turning green or red respectively. The receiver has a cable jack that plugs into Canon, Pentax, & other DSLR's with a 2.5mm jack. It is powered by the included CR-2 lithium battery. A Velcro mounting kit is supplied for securing the receiver to your camera. Receiver Transmitter 12-volt Battery CR2 Battery Tote Bag