Overhead Forklift Door Monitor. Alerts forklift drivers and pedestrians of dangerous encounters with forklifts rushing through strip doors, high speed doors and pass through openings. Mount the box on side you want to alert in, placing the sensor in the area you want to detect in. Features: 24 Volt plug-in wall transformer for a 110 Vac receptacle Forklift Sensor Wall Mounted Overhead Door Warning System 2 boxes 2 lights 2 remote sensors 15' power cord