Easily monitor vehicle traffic and pedestrians with this driveway motion sensor alarm. This motion detector is perfect for industrial sector or residential properties that require snow plowing, have heavy truck traffic, must monitor forklift traffic, or can't use driveway signal hoses in their driveway alert systems. The wireless driveway alarm does not use an air hose — instead, it detects movement up to 50' in front of it and rings the receiver chime each time the movement is detected from up to 1/2 a mile away. The sensor uses a 9-volt transistor battery. The chime plugs into an ordinary electrical outlet and produces a soft ring and has a built-in audio volume control. The driveway chime alarm will play one of twelve different tunes that are selected in the sensor. Place the chime near the front door to monitor visitors and let them know that someone has been alerted to their arrival. The chime has a volume control and can be turned up loud enough to be heard through the door of many houses. The driveway motion detector chime kit includes all of the pieces necessary to set up your wireless driveway alarm and driveway alert kit.