... 2.12-24 VDC 3.waterproof Best-selling Active Infrared Detector CY-M001Infrared Frequancy : 1.92khzPower supply : 12 ... rain ,dust ,etc Single beam sensor/single beam detector is used for automatic slide door, coil door , ... receiver, and the integrated amplifier can produce infrared beam.Narrow infrared beam (I or II) can avoid interruption ... on order quantity; Best-selling Active Infrared Detector CY-M001