The office door monitor provides important traffic information before even opening the door. A sensor placed outside the door detects traffic approaching the doorway and signals occupants inside the office of traffic outside. In this way, it helps protect workers leaving the office and entering warehouse traffic flows by warning them beforehand of the presence of vehicular traffic. System consists of a micro-box with a set of LED lights that are triggered by the included sensor. Includes wiring and cord with a 110/120V to 12V DC plug-in wall transformer that goes into a 110/120V receptacle. Cord length options are available below.