In noisier working environments, you need a back up alarm that can safely warn of backing hazards without being too loud or annoying. Like the quiter 97 dB 410, the Ecco 450 smart back up alarm is reverse-mounted uses your truck or trailer’s standard 4.5” rear signal grommet mounting it out of the way in the truck’s body. This makes it faster and easier to install and it also puts projects the warning sound directly into the hazard zone of the backing vehicle. One of the customer favorite features of the ECCO 450 Smart Alarm is the ability to monitor surrounding noise levels and appropriately adjust the warning sound level automatically. You get a safe SAE Type C safety warning without being annoying.