Get your semi Ready for the Road Ahead™ with proper alarms to notify spectators of a reversing vehicle, with the ECCO 300 Series 12/24V 87 / 112 dB Self-Adjusting Back-Up Alarm. Thanks to its ability to create an audible sound, this replacement component is the ideal choice to promote safety any time a vehicle is in reverse. Crafted with a durable weather-resistant construction to operate in all types of environments. FleetPride is your First Click in Heavy Duty®.