Unique Bargains Household 60M 2 Beam Indicator Light Active Detector

This is a pair of Active Detector.  Install them at the opposite positions.  Then there is a area between these two detector parts. When someone passes the region for an adjusted response time, the detector will send alarm signal to the security alarm host (which not included here).Install Distance(Max.)in the above chart means the maximum install distance between these two detector parts.Some red and green indicator lights are fixed.Great to be installed for security system in school, office building, hosipital, home yard, etc.An English Usage Manual included in the pack. It will give you detailed instructions. 

Other Attached Functions : Light Receive, OK Sign, Check Point;Housing Material : Hard PlasticSize (Each One) : 17 x 8.2 x 7.7cm,(L*W*T);Net Weight : 807g;Housing Color : Black;Package Content : 1 Pair x Active Detector1 x English Usage Manual1 Bag x Install Tools