Wireless Driveway Alert Alarm Motion Outdoor System Sensor Security Chamberlain CWA2000

Set includes one base receiver and one sensor (ability to additional CWPIR sensors-Sold Separately). PIR sensor is weatherproof and detects motion up to 30ft away and features adjustable sensitivity.Base receiver detects signals from sensors up to a 1/2 mile away (in ideal situations). Unique sound and light pattern on the base unit identifies which sensor has been triggered.Easy to install, no wiring required. Base units uses AA batteries or included AC adapter.