Profile: Marsh Products, Inc. provides vehicle detection and audio communication products for the drive-thru industry. Our brands include Spectrum™, and Teleplex™. Our 610 loop vehicle detector is designed to adjust to environmental conditions, virtually eliminating false detection. Our 614 message greeter is ideal for drive-thru communication systems such as those at fast food restaurants, banks and pharmacies, or other places where audible advertisements are required. It accepts a dry contact closure to trigger any one of nine recorded messages with clear, crisp audio output.