The Directional Vehicle Sensor is the ideal solution for monitoring driveways. With its ability to send different signals for inbound and outbound traffic, its long 1-mile wireless range, and its ultra-reliable battery operation, you'll always be aware of who is coming or going. The dual probes accurately detect vehicles and have immunity to false signals caused by lightning strikes. Operating from -30F to 120F, this product is reliable and efficient with a long battery life. Please note that it is only compatible with the 4000 series receivers.