Marsh Products, Inc.: Vehicle detection and audio communication products for the drive-thru industry drive through intercom,drive thru intercom,QSR,quick serve restaurant,quick-serve restaurant,message greeter,message repeater,Marsh Products,Marsh,Teleplex Systems,Teleplex,Spectrum Companies,Spectrum,vehicle detection,time and attendance, drive-thru intercoms,drive-through intercoms,audio communication,Batavia, Illinois,drive-thru restaurant equipment, attendance,time and attendance,time clock,clock Marsh Products designs and builds message greeters, vehicle detectors and detection loops for the drive-through industry.