Buy from Amazon : http://www.amazon.com/gp/product/B003TZ73C6?tag=scratchandsti-20 <br /> <br />2gig PIR1 Passive Infrared Motion Detector <br /> <br />Dual element sensor with 30 ft by 50 ft range <br />33 or 55 lb pet immune <br />90-degree look down 110 spread <br />Lithium battery with 5 years life <br />3 different mounting brackets
