The Mier DA-051-350 Drive Alert Sensor includes a durable PVC-encased sensor with a 350-foot cable, ideal for use with DA-500, DA-503, and DA-504 models. It effectively monitors a 10-foot radius and can be positioned up to 5,000 feet from the Electronic Master Control for flexible installation. Users can add up to three sensors to enhance coverage without reducing sensitivity, making it perfect for tracking vehicle movement in multiple areas. Additional cable lengths are available, providing adaptable options for various setups. Elevate your monitoring system with this reliable sensor today!