Extra Alert Sensor with VoiceDetects 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 VoiceDetects motion up to 30 feet away with wide 120 degree coverageTransmits signal to base up to 1,000 feet away2-way voice communication with receiverMotion sensor features adjustable sensitivity control to prevent false alerts from small animals
