This ceiling hung unit alerts forklift and pedestrian traffic of impending collision potential from 3 different directions. Motion sensors activate bright red LED lights when traffic is detected, increasing facility safety and protecting employees from possible injury. 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. Easily adjusted sensors provide non-distracting silent alert. 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.