We use this alarm on our kayak when we put the kayak on top of our SUV. We like to travel with our kayak on. Whenever we stopped in a town and walk around, we worried if the kayak was safe on top of our car. Even we stayed in a motel, we were not sure if the kayak was safe in the parking lot. This alarm is very sensitive. A slight movement will trigger the alarm sound. We tightened it under the kayak seat so no one can see it. It is a quick setup. the price is very reasonable. FIVE STARS for sure!