Update your semi with proper alarms to notify spectators of a reversing vehicle, with the ECCO 500 Series 12/24V 97 dB Sound Level Surface Mount Back-Up Alarm that ensures you're Ready for the Road Ahead™. Due to its direct connection with the reverse mechanism, this replacement component is able to create an audible sound any time a vehicle is in reverse. Constructed with a weather-resistant design to operate in all types of environments. FleetPride is your First Click in Heavy Duty®.