* Digital Quad Beam Detection from 60 - 200 meters
* Power input : DC 11 - 30V DC (no polarity)
* 8-channel beam frequencies selectable, for long distance appliance without crosstalk, when install 4-set up
* LED alignment with 10-level LED indicator, more quick and accurate
* PCB circuit is designed with double modulation,
detection method : Pluse infrared 20KHz to 500Hz
* Adjustable beam interruption period (50-700 msec)
* Lighting & Surge protection. Automatic gain control circuit.
* Anti-Frost design.