Product Details: Update your semi with proper alarms to notify spectators of a reversing vehicle, with the ECCO 300 Series 24V 87/112 dB Self Adjusting / Dual Function Back-Up Alarm that ensures you're Ready for the Road Ahead™. Once a vehicle is in reverse, this replacement component creates an audible sound to promote safety and prevent potential accidents. Manufactured with a weather-resistant design to operate in all types of environments. FleetPride is your First Click in Heavy Duty®.