The Dakota Alert 4000 Probe Alert Kit will notify you when a vehicle pulls up your driveway within approximately 10 to 12 feet. It includes a receiver, transmitter, probe, and 50 feet of wire. Bury the probe (parallel to the driveway) and wire underground and run the wire to the location of the transmitter box, which could be mounted on a post or nearby tree. The transmitter operates on four CR123A batteries and will send a signal (up to a mile away) to the receiver whenever a vehicle drives by the probe. This driveway alarm kit is recommended in locations where false signals from motion detection systems are caused by large animals such as deer. And since the probe is buried underground, it's less noticeable. The weatherproof transmitter is also durable and meant to be used in exterior locations.Notifies you when a vehicle pulls up your driveway (with 10 to 12 feet)Less noticeable with burial probe and wireTransmits to a Dakota Alert receiver up to mile awayReceiver provides 12 different tones to choose fromOnly detects vehicles and ignores large animals like deer The receiver plugs into a standard electrical outlet and can be wall-mounted or placed on a table. You can choose from up to 12 different tones to sound when the receiver gets a signal from the transmitter. It also provides volume control so you can set the sound to the desired level. Up to 16 Dakota Alert transmitters can be connected to a single receiver. The receiver has four form "C" relay outputs and one 12VDC output.ContentsReceiverTransmitterProbeWire12VDC Transformer(4) CR123A Batteries (U.S. orders only)NotesThe transmitter is only compatible with the 4000 series receivers.Signal range of transmitter will vary depending on the environment.CR123A batteries not included on orders outside of the United States.Technical DetailsManufacturer Part #: DCPA-4000UPC: 891179000768Receiver Power: 12VDC transformerOperating Range: -30°F to 120°F (-34°C to 48°C)Burial Wire Length: 50 FeetTransmitter Signal Range: Up to 1 mile, depending on the environmentTransmitter Batteries: (4) CR123A, included in U.S. orders only