Update your semi with proper alarms to notify spectators of a reversing vehicle, with the ECCO 800 Series 12/36V 97/112 dB Sound Level Surface Mount Back-Up Alarm that ensures you're Ready for the Road Ahead. 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.