Great for 4-way intersections, this motion sensor system activates bright red LED lights to warn forklift and pedestrian traffic of approaching movement from other directions. By going off only when it detects motion in two or more directions, it avoids signaling more often than it needs to, which helps keep people from becoming habituated to it and failing to notice it. Unit hangs from ceiling over intersection area, providing excellent sensor coverage and optimum detection capacity. Power is supplied through a pre-installed power cord. Cord length options are available below. If you wish to hardwire the sensor into your electrical system choose the Universal Transformer option.