This Dakota Alert Rubber Hose Alert detects a vehicle driving over a 25" x 3/8 dia. hose and sends a signal back to the receiver up to 1/2 mile away, so you know when someone drives onto or off of your property at your home, office, shop or outbuilding. Operates on one 9V battery (not included). Includes one rubber hose transmitter and a 25ft. rubber hose. Installation is quick and easy. Application: Property monitoring, Battery Type: 9V, Battery Included: No, Power Supply: Battery, Kit Includes: Transmitter, hose, Range (ft.): 2,640, Detections Motion (ft.): 25