Get your semi Ready for the Road Ahead with proper alarms to notify spectators of a reversing vehicle, with the ECCO Smart Alarm 12/24V 82/107 dB Sound Level Back-Up Alarm. To promote safety and prevent potential accidents, this replacement component makes an audible sound any time a vehicle is in reverse. Fashioned with a weather-resistant design to operate in all types of environments. FleetPride is your First Click in Heavy Duty .