Dakota Alert VS Wired Vehicle Sensor, Black (VS-250) The probe of the vehicle sensor detects metal objects, such as moving cars, in a ten to twelve foot radius of the sensor The probe and wire can easily be buried in turf with a shovel or a lawn edger. If the probe is to be buried in the middle of the drive Probe comes with 250 feet of wire which connects to receiver. Receiver is powered by AC outlet and probe by 9V battery