The expandable Driveway security system comes with one sensor and one receiver. Up to three additional transmitters (each sold separately 70-6004) may be added to each receiver (70-6005), allowing you to cover four different locations simultaneously, each with four distinct beeps. Be alerted in multiple rooms by purchasing additional receivers, sold separately.

Other features of the Reporter Wireless Driveway Alarm Alert System include:

• Amazing range; the sensor has a 30' range and can transmit a signal to the receiver up to 1,200' away.
• Detects humans and vehicles, but ignores animals.
• Waterproof sensor assembly.
• Weather shield included to protect sensor from the elements.
• Receiver features sound control and has an output to trigger external alarms or bells.
• Microprocessor code-learning technology eliminates false alarms — receiver responds only to transmitters assigned to it.
• One sensor can communicate with multiple receivers 70-6005 in larger installations.
• Four "AA" batteries(sold separately) will power the unit for approximately 2 years.