Polaroid offers this advanced wireless system of remotely activating a cameras shutter release along with synchronized flash operation. Although small in size and light in weight, these Wireless Flash Triggers are both receivers and transmitters, so either one can be the master actuator. They operate using a radio frequency of 2.4GHz and operate on any of 99 user selected channels. Add as many as you need for your photo shoot; they will all synchronize with one another.
You can place one on the camera and use the other to trip the shutter from a remote location up to 300-ft (with unobstructed line-of-sight). You can add a compatible flashgun to the wireless trigger attached to the camera then attach a second flashgun to the remote transceiver and trip the shutter from either location. All this and morewirelessly.