The Dakota Wireless Rubber Hose Driveway Sensor is built on the same concept as the "rubber hose" alerts you would find at a gas station or service station. The important difference is that this system is wireless! Use these extra transmitters in other locations such as a second driveway, other buildings, etc. These transmitters operate on one 9-volt battery and have 25' exterior hose that lie across the drive.
The transmitter is weatherproof and meant for exterior locations.