From Manufacturer
The Strike Finder Pro II Camera Trigger for Select Nikon Cameras from Ubertronix is a camera trigger system that fires your camera automatically in reaction to three distinct prompts: light, sound and laser response. The Strike Finder Pro II attaches to the hot shoe of your camera and connects via a dedicated cable to your camera's remote port. The trigger will activate your camera to shoot upon detecting sound, lightning (or other light flash), or when a laser beam is broken. For detecting sound a small attachment with an 18" cable that plugs into the side of the Strike Finder Pro II is required and included. Upon detection of the various prompts, the Strike Finder Pro II sends a signal to your camera to release the shutter. The camera will shoot within 45-60 milliseconds, providing you with photos that are nearly impossible to take with our own hand-eye reaction.
The Strike Finder Pro II with the MCDC2 cable is compatible with the following cameras: Nikon D90, D3100, D5000, D7000.