Prepare your semi to be Ready for the Road Ahead™, with the ECCO Smart Alarm® 12/24V 77/97 dB Sound Level Multi-Frequency Back-Up Alarm that offers proper alarms to notify spectators of a reversing vehicle. This replacement component creates an audible sound any time a vehicle is in reverse, to promote safety and prevent potential accidents. Engineered with a durable weather-resistant construction to operate in all types of environments. FleetPride is your First Click in Heavy Duty®.