Wireless Motion Alert System in black by Chamberlain

The Wireless Motion Alert system creates an expandable safe perimeter anywhere and is ideal for homes, businesses, worksites or any other property with no fencing. A base monitor communicates with a weatherproof outdoor sensor with an adjustable sensitivity control. It can support up to seven additional sensors (CWPIR) for a radius of up to 30 feet and can detect signals up to 1/2 mile away. This convenient safety and security system uses passive infrared (PIR) to alert with a unique light and sound pattern to identify which sensor has been triggered. Easy, wireless installation and programming make it simple to install anywhere. Simply secure: passive infrared (PIR) alerts with a unique light and sound pattern to identify which sensor has been triggered when vehicles or pedestrians approach, while allowing small animals to pass undetected Easy setup: no wiring is required and the base unit uses the included AC adapter or AA batteries (not included), which will last up to two years (NOTE: check user manual for technical specification before use) Proven quality: rigorous quality testing ensures lasting performance Product Dimensions: (D) 3.03 in. x (H) 1.77 in. x (W) 3.52 in. Additional assurance with 1-year warranty Includes battery/AC-powered receiver and one sensor (CWPIR) (additional CWPIR sensors sold separately) Chamberlain is the largest and most dependable garage door opener manufacturer in North America