* 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.