The Two Head Strobe systems feature all the circuitry in one housing and a bulb only in the second housing. These products are designed to flash an alternating Quad Flash display at a reduced cost versus 2 independent strobe lights. Each kit uses a 10' interconnect cable between the two strobe heads. This unique product eliminates the need for a remote power supply. Installation is much quicker than a conventional remote power supply/two strobe kit.