Ensure your semi truck is Ready for the Road Ahead with loud alerts for various irregularities , with the Cole Hersee 12V Universal Buzzer Alarm. Thanks to its ability to pair with a wide variety of components, this replacement system is the ideal option to warn operators of open doors, low air pressure levels, irregular temperatures, and more. Constructed with a ready-to-go design for easy installation and an extended product life. FleetPride is your First Click in Heavy Duty .