Excellent reversing alarm. I put mine on the switch so as not to disturb the neighbors when I'm not in an area that requires the use of an alarm, but when it's on it sounds nice and loud. This is a lightweight and easy to install alarm that has held up well to the weather so far. I installed it under the rear bumper of my truck and it has seen rain, ice and snow with no complaints. Want to sound like a UPS truck (or just make sure people know you're backing up)? This alarm clock will not disappoint you.