External Positioning Alarm Detector Infrared Beam Sensor Barrier For Gates, Doors, Windows Protection Against Hacking System $ 9.33 Detection Range:10-20M Model Number:External Alarm Detector Detection Angle:As Picture T:Alarm Detector Size:7.54.92.5CM Color:Black Weight:0.15KG Voltage:DC12-24V Outdoor Distance:10CM Indoor Distance :20CM Packaging:1 Suit
