JJC JM-II series Radio Frequency Wireless Shutter is designed for most DSLR and SLR cameras that have a remote socket on the camera body. The system works at  433MHZ frequency and has 16 available channels. What’s more, this wireless remote system allows the transmitter to trigger the receiver from 30 meters away. The JM-II receiver simply attaches to a compatible camera's accessory shoe, and then just connects the supplied JJC receiver cable to the camera's remote socket. The receiver is powered by one piece of CR-2 lithium battery while the transmitter is powered by one piece of 23A battery. JM-II transmitter can trigger the camera shutter at five modes: single shot, 5 seconds delay shot, 3 continuous shots, unlimited continuous shots and bulb shot. The receiver has a 1/4"-20 tripod mount socket on the bottom, so you can even mount the receiver onto a tripod. Most importantly, our JM-II transmitter is able to fire multiple receivers at the same time. The receiver itself with the connecting cable can be used as a Wired Remote Switch, then half press to focus, full press to take a photo. All these features make it good for eliminating camera shake in long exposure photography.