Detects motion of pedestrians and vehicles and allows you to speak with them. Box contains 1 sensor unit, and mounting bracket and hardware.

* To be used with the Chamberlain Wireless Vehicle and Pedestrian Alert with Voice
* Detects motion up to 30 feet away with wide 120 degree coverage
* Transmits signal to base up to 1,000 feet away
* 2-way voice communication with receiver
* Motion sensor features adjustable sensitivity control to prevent false alerts from small animals